How to Merge Layers in Procreate: A Comprehensive Guide

As a Procreate artist, learning to wield the power of layers is key to working efficiently and non-destructively. One of the most essential layer management skills is knowing how to merge and unmerge layers strategically.

In this comprehensive guide, I‘ll cover everything you need to know to become a layer merging expert in Procreate. I‘ll explain the different ways to combine layers, how to unmerge layers, and creative techniques you can use with merged layers. I‘ll also provide tips and best practices for a non-destructive workflow.

Whether you‘re just starting out in Procreate or consider yourself a pro, this guide will help you take your layering skills to the next level. Let‘s dive in!

Understanding the Procreate Layer Stack

Before we jump into merging, let‘s make sure we‘re on the same page about how layers work in Procreate. If you open the Layers panel, you‘ll see a stack of your layers with the bottom layer at the top and the top layer at the bottom.

[Screenshot of layer stack]

Layers at the top of the stack appear in front of layers at the bottom. You can think of your layer stack like a stack of transparent sheets – you can see through the top layers to the artwork on the layers below.

Procreate supports several different layer types:

• Raster layers which contain pixel-based artwork
• Vector layers which contain resolution-independent shapes and lines
• Text layers for adding typography
• Reference layers for tracing images
• Adjustment and Effect layers for non-destructive edits

Each layer has its own settings like Opacity, Blend Mode, and Lock options that control how it composites with the rest of your artwork.

Why Merge Layers?

Now that we‘ve covered the basics of the layer stack, let‘s talk about why you might want to merge layers in the first place.

Merging layers combines the artwork from two or more layers into a single layer. There are a few reasons you might want to do this:

1. To reduce the complexity of your layer stack. A clean, well-organized layer stack is easier to navigate and can improve performance on larger canvases. According to tests done by the Procreate team, a canvas with 20 layers can see up to a 40% reduction in GPU memory usage compared to the same artwork with 100+ layers.

2. To combine layers that you‘re finished editing individually. Once you‘ve finalized the details on a set of layers, merging them together can help keep your canvas tidy without losing any quality. It also makes the contents easier to transform and manipulate as a single unit.

3. To free up space for new layers. Depending on your canvas size, Procreate has a limit on the maximum number of layers you can use (from as low as 3 layers on the smallest canvases up to 220 layers on the largest). Merging layers frees up slots so you can keep creating.

4. To apply adjustments and effects to multiple layers at once. Filters and adjustments affect a single layer at a time. By merging layers, you can apply an effect like Gaussian Blur or Hue/Saturation to all the merged artwork together.

5. To export your artwork with transparency. If your layer stack contains transparent areas and you want to export your work as a PNG, you‘ll need to merge the visible layers to preserve that transparency in the final file.

Of course, you can‘t always merge layers with reckless abandon. Once two layers are combined, their previous individual states are lost and the artwork is flattened together. It‘s a good idea to be sure you‘re finished making granular edits to layers before merging them.

The Art of Merging Layers

Procreate offers a few different options for merging layers together. Let‘s look at each one and when you might want to use them.

Merge Down

The simplest and most common way to combine layers is with the Merge Down command. This takes the currently selected layer and merges its contents down into the layer directly below it. The original top layer is deleted and you‘re left with a single merged layer.

To Merge Down:

1. Select the top layer you want to merge by tapping its name in the Layers panel
2. Tap the Layer Options menu at the bottom of the panel
3. Choose "Merge Down"

Alternatively, you can also swipe left on the layer and tap "Merge Down" in the popover menu.

[GIF of merging two layers with Merge Down]

Merge Down is best when you have two adjacent layers that you want to combine permanently. Keep in mind that any transparency on the top layer will be lost when merged – the opaque areas will block the artwork below.

Combine Down

Combine Down is a variant of merging that preserves the individual layers and any applied effects, but groups them together. Rather than flattening the artwork into one layer, it creates a new Group layer containing the original layers.

This is handy if you want to keep the flexibility of adjusting each layer individually, but want to move or transform them around the canvas as a unit.

To use Combine Down:

1. Select the top layer you want to combine
2. Open the Layer Options menu
3. Choose "Combine Down"

The selected layer and the one beneath it will be nested into a new Group together, but remain as separate layers.

[Screenshot showing Combine Down result]

Merging Multiple Layers

What about when you have a whole set of layers to merge at once? Rather than repeatedly using Merge Down, you can combine multiple layers in one step.

To merge a contiguous range of layers:

1. Tap the top layer to select it
2. Tap the bottom layer and hold
3. With a second finger, tap the selected top layer again
4. Keep both fingers down for a moment until the layers are highlighted blue
5. Release your fingers and the layers will merge together

[GIF demonstrating the multi-layer merge gesture]

To merge non-adjacent layers, you can use the Select tool:

1. Tap the cursor icon in the top left corner to activate the Select tool
2. Draw a selection around the thumbnails of the layers to merge in the Layers panel, or tap each layer to select it
3. Tap the Layer Options menu
4. Choose "Merge Selected"

[GIF showing lasso selecting multiple layers and merging]

Remember, merging multiple layers at once is permanent, so make sure you‘ve finalized your individual layer edits before combining.

Merging with Blend Modes

Blend Modes are special settings that control how a layer composites with the layers below it. Procreate includes 27 different Blend Modes that create effects like Multiply, Screen, Overlay, and more.

When you merge layers, any Blend Modes that were applied to the original layers are rendered into the final merged artwork. However, it‘s important to note that some Blend Mode combinations can effectively cancel each other out.

For example, if you merge a layer set to Linear Burn with a layer set to Linear Dodge (Add), the two will neutralize each other and leave only the neutral gray background visible.

[Screenshot example of Blend Modes cancelling out when merged]

To avoid surprises, it‘s a good idea to test your Blend Modes on duplicated layers before committing to a merge.

Flattening vs Merging

In addition to the Merge commands, Procreate also has a "Flatten" option in the Layer Options menu. While it sounds similar to merging, Flatten actually combines all your visible layers into a single layer while discarding any hidden layers.

Flatten is mostly for when you‘re completely finished with your artwork and want to simplify it down to a single layer for export. In most cases, you‘ll want to use the more specific Merge commands to combine only certain sets of layers while preserving the rest of your layer stack intact.

One other difference is that Flatten always discards transparency, while merging preserves transparency by default. You can replicate the flattening behavior by choosing "Merge Down Flatten" instead of "Merge Down" if needed.

Creative Uses for Merged Layers

Once you‘ve got the hang of merging layers as an organizational tool, you can start exploring the creative potential of merged artwork.

Merged layers open up a lot of interesting artistic possibilities:

• Merge layers with different Blend Modes to create unique color and texture effects
• Merge a photo with a hand-painted layer to create a painterly photo composite
• Merge a watercolor wash with line art for an organic, traditional look
• Merge a textured background with a typographic design for a tactile letterpress effect

One of my favorite techniques is to use alpha-locked merged layers to quickly create a multi-color texture. Here‘s how:

1. Fill 2-3 layers with different colors or gradients
2. Merge the layers together
3. Alpha Lock the merged layer
4. Paint with a texture brush to apply the merged colors as a single textured layer

[GIF example of painting on an alpha-locked merged layer]

Experiment with different combinations of brushes, colors, and Blend Modes to create your own unique merged effects. The possibilities are endless!

Non-Destructive Layer Merging

As I mentioned earlier, it‘s important to be mindful about when and how you merge layers to avoid losing your original layered artwork. Luckily, Procreate has a few features to help you merge non-destructively.

First, remember that you can always tap the Undo button in the top left corner (or do a two-finger tap on the canvas) to undo a merge and restore your previous layer state. However, Procreate can only store up to 250 undo steps, so you wouldn‘t be able to undo a merge if it was more than 250 actions ago.

One of the simplest ways to protect your layers is to duplicate them before merging. Just swipe left on a layer and tap "Duplicate". This preserves a copy of the original layers in case you want to tweak them later.

You can also create a Layer Group by dragging one layer on top of another in the Layers panel. This lets you merge layers within the Group while keeping the rest of your layers safely isolated.

Finally, consider saving iterations of your artwork along the way using the "Share" button in the top left corner. This exports a copy of your work with all its layers intact. Even if you accidentally flatten or merge layers, you‘ll still have the layered version saved.

Exporting Merged Artwork

When you‘re ready to share your work with the world, Procreate gives you a few options for exporting your canvas. If you want to send your artwork to another app or print it out at a high resolution, you‘ll probably want to export a flattened version of your work.

Under the Share menu, you can choose "PNG" which will merge all your visible layers into a single PNG image. If you have any transparent areas in your canvas, they will be preserved as transparency in the exported PNG.

For a layered file that you can open in Photoshop, choose "PSD" instead. This will export your entire layer stack as an editable PSD. Any merged layers will appear as merged in the exported file.

One thing to note is that Procreate‘s native file format is .procreate, which uses the .ZIP compression standard. If you try to unzip a .procreate file, you‘ll see the individual layers stored as separate PNG images. However, any merged layers will be flattened into a composite PNG rather than remaining as separate files.

Expert Tips for Merging Layers

Here are a few pro tips I‘ve learned from my years of working with layers in Procreate:

• Name your layers descriptively as you work. This makes it much easier to tell which layers to merge later on.

• Use the Combine Down command if you think you might want to tweak the merged layers individually later. You can always merge the group permanently afterwards.

• Avoid merging layers that have Clipping Masks. The mask will be applied and the original layer deleted, making it impossible to edit the mask non-destructively. Clip to a merged layer instead.

• Make strategic use of Reference layers and Layer Masks rather than permanently erasing or merging artwork. This lets you keep your options open as you work.

• If you tend to merge layers frequently, consider working with a larger canvas size to increase your layer limit. Procreate supports up to 220 layers on the largest canvases.

With practice, merging layers will become second nature and a key part of your Procreate workflow. Don‘t be afraid to experiment and find the techniques that work best for you!

Unmerge with Confidence

We covered a lot of ground in this guide, but you should now have a thorough understanding of how to merge and unmerge layers strategically in Procreate.

Whether you‘re combining layers to clean up your canvas, creating unique effects with merged Blend Modes, or flattening your artwork for export, the tricks you learned here will serve you well in all your Procreate projects.

Keep exploring the potential of merged layers and don‘t forget to share your creations! The Procreate community is a great place to learn and be inspired by other artists who are mastering the app.

Do you have any favorite techniques for merging layers? What‘s your best tip for staying organized while merging? Let me know in the comments!