The Descriptive metadata tab (keyboard shortcut Alt+D) allows you to edit basic information about your photographs, such as the title and description.
The first thing I usually do with a new set of photographs is to set the copyright and creator/artist metadata. Select all the images (keyboard shortcut Ctrl+A) then click on the Auto button next to the Copyright text entry box. The first time you do this Photini asks you to provide the name of the copyright holder. This should probably be your name, but could be the name of a company. Type in the name and click OK.
The Auto button generates a standard copyright notice, but if you prefer a different wording you can edit the text manually.
Next click on the Creator / Artist field’s Auto button. Now Photini will ask for the name of the creator. Edit the name if required, then click OK.
Note that all the image thumbnails now have a warning symbol (⚡) displayed next to them. This shows that they have unsaved metadata edits. The File menu Save images with new data item (keyboard shortcut Ctrl+S) saves your edits and clears the warning symbols, as shown below. I do this frequently to avoid losing any of my work.
Next I set the title. Select all the images that should have the same title, then type the title in the Title / Object name text editing box.
Now type more detail in the Description / Caption box. There are probably only one or two photographs that share the same description.
Finally you can set a list of keywords for the image by typing them in the Keywords box. Keywords should be separated by semi-colon (;) characters.