As a Prepress Operator, you will need to master following:

• Adobe Illustrator
• Adobe Photoshop
• GIMP (graphics editor software)
• Microsoft Visio
• SketchBook Pro
• Synfig
• arrange printer sheets
• follow safety precautions in printing
• graphics editor software
• inspect printing output
• interpret illustration needs
• operate printing machinery
• produce prepress proof
• proofing methods
• types of paper

More generally, a prepress operator is also versed in:

• follow a brief
• lay out digital written content
• perform image editing
• prepress processes
• printing techniques
• provide customised products
• quality standards
• use microsoft office

It also helps to know the following:

• cut page edges
• maintain lithographic printing plates
• maintenance of printing machines
• manage process of flexographic print
• mix ink
• output electronic files
• printing materials
• screen printing process
• use colour printing programs
• use markup languages
• calibrate electronic instruments
• communicate with customers
• manage offset printing process
• perform machine maintenance
• proofread text
• reprography
• troubleshoot
• wear appropriate protective gear