Vim has certain limitations with the visual display, especially in the terminal. Even if it were possible, you'd probably have to modify Vim's source code for it. Therefore, only some ideas:
- In a multi-line block selection, the selection end is only obscured in the current line, not the ones above. So, you should still be able to visually parse the entire block as such. (Only exception: visual blocks extending to end-of-lines.) I'd imagine the real issue is with characterwise selections.
- You can
:set selection=exclusive, where the position before the cursor marks the end of the selection. It's a different paradigm, sometimes has differing behavior, but you may prefer that. - When you've
:set ruler, you'll see the current cursor position and size of the visual selection as numbers in the bottom right corner. This can be helpful to ensure you've selected the right area.