Borders can be placed around a stitch or group of stitches. An entry for the border is placed in the key. Borders can be drawn on any of the four sides (North, South, East, West) of the stitch cells or any combination. The border's name, colour and line style can all be customised.
To place a new border around a group of stitches;-
Select the stitches (see Selection Tools).
On the main menu bar, select Border > Place Border on Selected Stitches > All Sides / North Side only / South Side only ..... etc as appropriate.
A new border will be drawn around the stitches on the appropriate sides. Values from the current Appearance stylesheet (see Editing a user Appearance stylesheet) are used as initial values for the border. These can be changed at any time by using the Edit Border dialog.
To place an existing border around a group of stitches;-
Select the stitches.
On the main menu bar, select Border > Place Existing Border on Selected Stitches (not visible if there are no borders yet). A sub menu will be dynamically created that lists all of the borders present. Select as appropriate.
The existing border will be drawn around the stitches.
Alternative sources of explanation
Find all blog posts tagged Borders: https://www.stitchmastery.com/tag/borders