Feature Request: Create hints

I use Obsidian App to take notes. I can select recent file from sidebar. like this:

However, I don't want to select file via mouse. So I made a macro to click via keyboard like this:

However, I can only quickly figure out the 2th, 3th, 4th item of list. For the 7th, 8th, 9th I have to count the number to choose.

So I hope I can create some hint(⌘1, ⌘2, ⌘3...) like Alfred do:

image

Specifically I hope I can create text showing on a certain location of screen like Vimac do (hint A, B, C, D, E):

Is there any 3 part app can make hint freely?
Any suggestion is appreciated!