When working on a particularly large file, there are a few things you can do to improve performance and take additional burden off of your machine or device. See the suggestions below.
If the device or machine you're using is low on available memory (RAM), Sketchbook will be impacted and may start to show performance issues particularly on large canvases or memory-intensive processes such as Predictive Stroke or Steady Stroke, or a long Time Lapse recording. As a first step we recommend you try freeing up memory by restarting your device.
Improving performance on Sketchbook Pro for desktop
Besides freeing up RAM, adjusting your preferences in Sketchbook Pro is where you can benefit the most.
The first thing we always recommend is to turn off Enable Rotate Canvas. When working with an extremely large canvas, you can experience slower performance when this setting is enabled. Turning this option off can make a huge difference. See Preferences for instructions on how to do this.
Another preference to turn off to improve performance is Display brush stamp, which displays the stamp of your brush while drawing and is another thing that needs to be rendered while you draw. You can also experience a lag in performance when using large brushes. Brush Stamp is enabled/disabled from the menu bar in the View menu.
Two last things you could do would be to reduce the maximum number of undos.
If you are experiencing issues with Sketchbook Pro freezing or crashing on a secondary monitor, please read this article.
Improving performance on Sketchbook for mobile devices
Your preferences are where you can benefit the most. The first thing we always recommend is to look at your canvas size and layer usage. If you don't need to be working with an extremely large canvas with a lot of layers, select a smaller canvas size. Since a larger canvas and layers can take its toll on your device's memory reserves, this can greatly improve performance. If you really need to be working on a large canvas, try restarting your device to free up RAM that was in use in the background, to make more available to working with this file.
The other thing you can do is turn off Rotate Canvas. When working with an extremely large canvas, you can experience slower performance when this is enabled. Turn this option off can make a difference. See Preferences for instructions on how to do this.
