In order for your resources to be bookable, they must have adequate availability. Go to "Availabilities" -> " Presences" in your profile settings. You can view all the recorded presences of your resources by clicking on their profiles.
Now click on "+" to add another "availability".
In the following window, you can now select the resource. If the working hours are the same on certain days, then select these days (here in the example Mo-Fr the same times). Now you can enter the times below. With another time series, you can take into account e.g. breaks. Simply delete a time series by clicking on the cross next to it.
Then click on "Add" to save your settings.
Here you will learn how to record presences and absences in the step-by-step setup.