Zooming with the keyboard shortcut command + or command – will change the zoom by increments of 25 percentage points.
Personally I find this to be too much and the view is always either too big or too small. This set of two scripts change the increment to plus or minus 5 percentage points.
Put the two scripts into the Indesign scripts folder and assign them a keyboard shortcut each. Use the same shortcut as before (command + and command -) if you want to replace the default behaviour. If you click and hold down command and either plus or minus, the view will quickly zoom by 5% increments. These simple scripts can easily modified in Script Editor to change the percentage as you wish.