How do you override a snap grid placement?

A quick UI question: How can you temporarily override the snap grid in something like the blend space axis graph? For example: You have a 1D blend space axis from 0 to 375 with the default grid line count of 4. How can I place an element in a spot not on a grid line (like at 80)? In other apps, I’m used to using a modifier key (like Ctrl) to enable placement off of a grid line.

Yes, I know I can disable snap-grid in the settings or define 375 grid lines but I was looking for a more sensible solution than that so that I don’t have to constantly toggle the snap-grid enable setting.