I want to ask 3 things, but I’m not sure if it would be appropriate to create one post for each:

• The keyboard shortcuts panel feels awkward. Either allow the user to resize it or make it a popup si you have more space to view the shortcuts more comfortably.
• Actually show all shortcuts. There are many that aren’t available there so you can’t really use it as a reference. For instance, Alt+R adds a mark in the center of the selected element, but when I went to the keyboard shortcuts menu to understand what this mark actually is I couldn’t find anything and I can’t tell if I am doing more than just adding the mark because I couldn’t find the keyboard shortcut there.
• Allow the user to enter a keyboard shortcut to learn about it. Currently you can find the keyboard shortcut to do something in particular through Ctrl+P, but not the other way around.

I’m a web developer and I use VSCode. This code editor allows you to see all keyboard shorcuts and filter by combination of keys. Just in case you need some inspiration to implement these features.