Too many rows in single rule, renaming screen cut off

In an effort to minimise the # of rules and use more dynamic fields, i have lots of IF statements which reaches down to the bottom of the page.
When using dynamic fields to rename the file, i cannot scroll or see the window as it is too low at the bottom.
Has anyone experienced this?
I'd rather not try to reduce the number of rows as down the track i'd like to add more IF statements to capture a wider array of files in that category, 1 mega rule.
- The red arrow is where the bottom of the screen finishes...
https://ibb.co/eF0aiL
When using dynamic fields to rename the file, i cannot scroll or see the window as it is too low at the bottom.
Has anyone experienced this?
I'd rather not try to reduce the number of rows as down the track i'd like to add more IF statements to capture a wider array of files in that category, 1 mega rule.
- The red arrow is where the bottom of the screen finishes...
https://ibb.co/eF0aiL