This sets the cursor for where you will start removing letters. The first character is 1, 0 is only an option for the Insert portion. If you are attempting to delete text, you should always start from position one.

You could also select to Start from the end of the filename if you wanted, if you choose that option, then your starting position will start from the end of the file, instead of the begining.

Example filename: testing.pdf

For example, Starting position 1 without the Start from the end of the filename checked would start with the letter T. If the Start from the end of the filename was checked, then Starting position 1 would start with the letter G.

Delete / Remove:

Delete / Remove lets you remove part of your filename starting from wherever you want, and allows you to remove how ever many characters you want. Please read below for more details on how to accomplish this.

Example filename: test-0005.pdf

If you wanted to remove the -0005 from the filename, you would set the Start from position to '5', and you want to delete -001 which is 4 characters in length, so set the Delete / Remove to be 4. Click Preview to make sure everything looks correct, then if you want to rename it, click Apply.

Insert:

Insert allows you to insert text starting from any location in the filename you want.

For example, if you had test-0001.pdf, and you wanted to insert two (2) more zeros after the index, you could insert 00 starting from the fifth position, and your new filename would be test-000001.pdf.