I am using DrawIt plugin in Vim 7 to draw some ASCII diagrams.
This might be too much, but still—
Is there any plugin which can display a grid in background, to make the drawing easier?
I can't add anything to @David and @romainl's thoughts (I think @romainl's suggestion of using a semi-transparent window with a grid behind it is inspired!).
However, you might find it easier to visualise the cursor position by using:
set cursorline
set cursorcolumn
Of course it's not a substitute for a true grid, but it will at least let you see at a glance the alignment of the cursor.