Form Compression is an available R:BASE setting which allows you to store all R:BASE forms as compressed within the large object data file (.RX4). The default value for Form Compression is set on. With Form Compression, you are taking advantage of smaller amounts of data being transferred across your network.
However, with Form Compression enabled, you cannot view or search the SYS_DATA column details within the in SYS_FORMS3 system table. One would be able to take advantage of this option for viewing the raw details of the form.
To view the setting, choose "Settings" > "Form Designer" from the main menu bar. Within the "Miscellaneous" panel, there is the "Use Compression" check box.