I have a few observations to make about the function pane and a few improvements to propose.

1. I could not find the keybind, is there one ?

I propose LeftALT+F by default ?

Unused horizontal space

It seems there is this horizontal space, maybe it’s useful in another language, but for me, there isn’t anything useful in that space. Maybe it should be reduced somehow ?

You can use the horizontal scroll

https://youtu.be/Zyyg1zANWvA

But it seems to reset all the time, I don’t bother to manually re-adjust every time.

https://youtu.be/7CnTWWyzR3w

I would like, to make use of that space, without having to continuously micromanage this.

X. Function filtering

In my language, functions which begin with “_”
Are not functions, they are internal labels by convention (this is not part of the language)

So I have many of these functions that repeat the same function.

Sometimes there are good navigation markers, but sometimes they just bloat the list.

It would be great to be able to hide functions that start with “_”. but have a toggle button to show them if I suddenly need them.

Example

X. Resetting the function search

You can type a search, but clearing the function search needs to select and then use the keyboard to delete the text.

Many software show a clear button in the textbox, when search text is present. This way the search text can be cleared with a single click, rather than select text then press backspace or delete or ESC.

Here is how I propose to make this easier.
When there is search text, show an X on top of the text box.

Example

So you can just click the X to clear the search.

Alternatively, the “_” function that share the same basename as the function, could be [+]unfoldable.

Like this button, maybe ?

X. function search length has a maximum !

The max lenght is 16 characters

But I have many alternative function with names common to longer than that, please increase it, or even remove the limit ?

X. The function search sidebar is somehow, never the right width !

I don’t know why, but I am constantly adjusting the width of the function search sidebar.

I don’t know why I can’t just set it once and forget it. Presumably just the right width, I shouldn’t need to touch it again. But somehow, I don’t know what I do, but I do move and resize notepad++ a lot with AltSnap and I end up often having to readjust the function sidebar width.

And I struggle to hit that narrow width to drag it.

Beside what could be done to automatically have it be “the right size” automatically.
I suggest these.

Make middle-click-drag allow drag-resizing of the sidebar (and maybe the move the other-view separator ?

X. The function sidebar cannot be docked to the other view separator

You can snap the function search sidebar to the

right

left

top

bottom

and even floating

but not in the middle

X. Visual glitching during resize

Not a big deal, but the re-paint algorithm is quite sloppy
It could be improved

Ok, this is everything I had for you regarding the Function sidebar, thanks !