List of missing/outdated documentation pages

[OverloadedOrama]

This is a list of documentation pages that are either missing or outdated:

• [x] 3D layers
• [x] Importing (how to import images, palettes, as well as import options such as new project, frame, layer, spritesheet, reference image)
• [x] UI customization (how layouts work, how panels can be moved)
• [x] Image effects and how they can be animated
• [x] How to change shortcuts
• [x] Blend modes
• [x] Mention z-index in the cel page
• [x] Mention the palette file extension change
• [x] Layer effects (non-destructive image effects)
• [x] Change project structure now that they are .zip files
• [x] Update the UI image on the user interface basics page.
• [ ] CLI
• [ ] Reference images
• [ ] Dynamics (pen pressure, mouse/pen velocity)

[Variable-ind]

• [x] Crop tool needs mentioning
• [x] Global tool options aren't listed in the interface basics (image also needs update)
• [ ] Paste tag system.

info about pixel, group, 3d cels can be added to the cel.md located in concepts, layer and frame should also be added to concepts as frames_layers.md (frame is a collection of cels, i don't know how to define layers but we need to list different types of layers too)