Fields are not added directly to a project, but rather to a table in the project. Select a table from the Project Browser and then click the 'New Field' tool bar icon or open the Tables menu > Fields > New Field.

Select the field by clicking on it in the Project Browser (if it is not already highlighted) and click on its name or press F2. A cursor will appear allowing you to rename the field.

Yes. Click on a field in the left panel, and then click on the down or up arrow in the toolbar to move the field up or down. If you prefer to use the keyboard, select the field and press Ctrl+u (move the field up) or Ctrl+d (move the field down).

Yes. Add a new field to one of your tables, and in the field properties panel, open the drop down labeled "Copy properties from" and select the field that you want to copy. The properties of the new field will then be set to the same values as those of the field you selected from the drop down.

Select the field by clicking on it in the Project Browser and press the Delete button.

In AppGini, click with the mouse on any property and press F1 to obtain help about its function.