These actions can be done in several ways:
1. By clicking on the corresponding buttons (Add, Delete, Edit).
2. By pressing the underlined key in the name of the buttons (for Add we press the 'A' key, ...).
3. By using shortcuts: Add - Ctrl+Ins, Edit - Ctrl+F8, Delete - Ctrl+Del
There are some cases where these actions are not allowed in order to preserve the integrity of
the data (e.g. deleting an event from the event table if tickets have been sold for that event).
Adding
Adding is used to add rows of data into documents or lists (e.g. entering seat setup details)
Fill in the corresponding fields and click on the Save button to complete the adding action.
Deleting
This action is easily done by selecting the row to delete and clicking on the Delete button.
Editing
Editing is done by selecting the row to edit and clicking on the Edit button.
It is necessary to click on the Save button to save the changes in the database. In order to edit
fields correctly, it is necessary to go through all the fields of the selected row (even if all the fields
are not being updated), since the button Save is enabled only at that moment.
