This tab allows to compare text definition of some particular database programming object (like view or trigger) or text column value:
Vertical toolbar between two panels contains additional tab-specific actions:
The state of Show tab and space characters, Show line number, and Word wrap toggles is common for the Text diff tab and other tabs having bottom text preview (Object list, etc.).
Main text area highlights new and changed lines (whole line highlighted), bottom panel shows selected line with per-character changes highlighted. Top panel shows text changes summary: total number of rows, new, changed, new+changed and unchanged line counts. Note that when you change text comparison options like ignore case or white spaces - changes highlight and new/changed totals can be changed because of different text comparison rules.
You can filter text lines to show only new, changed or new+changed lines. In this case most of the unchanged lines are collapsed and can be shown/hidden using the +/- buttons to the left of the text area. Number of unchanged lines shown by default is configured in ADD.LINES field in the right-top corner.
When Word wrap is enabled, horizontal scrolling is disabled, as it is no longer needed in this mode. To maintain visual alignment of wrapped lines between the two sides of the diff, the opposite line may be padded with a number of non-breaking space (NBSP) characters. These characters are not shown in Show tab and space characters mode, but will be present when selecting and copying text. In rare cases, word wrapping may cause the number of visual lines to differ between the two sides of the diff. If this disrupts readability, it is recommended to disable Word wrap for such texts.