You can have up to 20 definitions. Note that you can use a printer definition to pipe a spreadsheet output to another application. Xess contains a class of functions called Embedded Tools to accomplish these tasks. More information is available in online help . Xess does not impose any artifical limits.
Environmental issues including the amount of available memory are the pacing items.
When I am importing a text file or even selecting and pasting a text string from another window into a cell, each word goes into a separate cell. I wanted the entire string of words in a single cell. You can control parsing of text strings with either import method using the Import Options dialog from the Options menu. For OpenVMS platforms, Xess uses Digital's License Management Facility. Xess spreadsheet files are encoded text files and therefore completely portable across platforms and email systems.