Preset ability to add value vs setting specific value

I have been using FMRTE for a long time and have a few presets created, but I have always wondered if there is a way to have the preset 'add' instead of 'replace'. I mean instead of setting an attribute to 20 or 1, I would like to add 5 or remove 10 to the player/staff existing value. My suggestion is to be able to create presets that will add or subtract a set amount from the existing attribute value.

There is the option of clicking on the +1 or -1 for ALL attributes, but I would like to be able to select specific ones in a custom preset.