Contextual Mode makes putting 4D's data on the web extremely easy. One very nice thing about contextual mode is that it will break up a large selection of records into several pages. For example, if you have 1,000 records in the selection and display them on the web via MODIFY SELECTION, 4D will only (by default) display the first 20 records, and provide hyperlinks to see additional pages of records. Suppose, though, that you wanted to see only 10 records per page. This is easily done with the command SET WEB DISPLAY LIMITS.

More information:
Command Web Services, Overview
https://ftp.4d.com/aci_Technical_notes/ACIDOC/CMU/CMU02008.HTM