Manageing an existing BiBTeX

Open an existing BiBTeX follows standard method of openning files i.e. Ctrl+O or File ▸ Open in menubar.

Manageing an existing BiBTeX file using mkBiB can be done in two way.

Editing The View Pane

All the elements visible in the right pane can be edited by double clicking on the corresponding cell.

Only visible columns, i.e. 5 columns can be edited. For all other columns, you have to do it manually, using a Text Editor.

New Entry In Existing File

You can enter new entries in existing BiBTeX as described here or here.