Sheet processing apparatus and image forming system

An image forming system comprising:

• an image forming apparatus that forms an image on a sheet;
• and
• a sheet processing apparatus that performs a folding process on the sheet on which an image is formed by the image forming apparatus, wherein
• the sheet processing apparatus comprising:
• an abutting member that abuts against a sheet surface to bend a sheet;
• a first moving unit that moves the abutting member;
• a folding unit that performs a folding process on the sheet bent by the abutting member;
• a pressing unit that presses a folded portion of the sheet subjected to the folding process;
• a second moving unit that moves the pressing unit in a direction along a fold of the sheet;
• and
• a single operation unit that allows the first moving unit and the second moving unit to be operated.