Keyboard grid cell navigation

[ComFreek]

When within one node, I'd suggest that pressing one of the arrow keys navigates the user to the desired node.

Maybe Ctrl-arrow key also adds an edge.

[Yichuan Shen]

I'm not sure how you envision the keyboard shortcuts. When you're within one node, you're inside a text box, editing the LaTeX code for that node. Pressing arrow keys should move the caret of that text box.

[ComFreek]

You're right, arrow keys on their own would break normal editing.

• arrow keys alone
• Ctrl-arrow key is commonly used for "fast forward to next word" in edit controls, isn't it?
• Alt-(left|right) is used in browsers for navigating back and forth.
• Tab would inherently only support going to the right.

Personally, having such a feature would certainly be useful, so one might consider overwriting one of the keyboard shortcuts above.
Or what about mirroring Excel a bit and having two modes: edit mode within one node and normal mode. In normal mode a single node is always selected. The selection can be moved with the arrow keys. Hence, the workflow for entering "A B" would be:

• [Website loads in "normal mode", the center node is selected]
• Press A, then Enter
• Press right arrow key
• PressB, then Enter.

Maybe pressing Shift-arrow key in normal mode moves the selection while also adding an arrow.