Blender

Showing custom UI panel in Blender by pressing keycodes

When creating add-ons for Blender, developers almost always create the user UI panel with tools that provide the main functionality of the add-on. Typically, such custom panels are placed in the N-panel block, called by pressing the N key. However, if it is assumed that the user will often call the panel with add-on tools, its call can be bound to a keyboard shortcut and the panel can be called from the keyboard.