Post help is shown differently for custom fields and profiles.
Post help is shown differently for custom fields and profiles.
For custom fields :
Pre help is displayed inline on the form (above the field). Post help is displayed in a pop-up - users click the help balloon to view help text.
For profiles :
Pre help and post help are explanatory text displayed to users for this field before and after fields respectively.
I think the standard should be followed with the profiles where post help is shown as a pop-up to keep it consistent. Users do get confused why the post help is not a pop-up.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information