In order keep configuration simple, please perform the following steps in Salesforce Classic (Booker25 is Lightning-Ready, you may afterwards use the app in Salesforce Lightning as you please)
After you have created a single resource calendar for a custom dimension you might want to create a button on the record layout that links the user to the single resource calendar.
Step-by-step guide
Navigate to the custom object in salesforce setup.
Go to the subsection Buttons, Links, and Actions
Click New Button or Link
Give the button a name and label for example: View Calendar
Display type can be either: Detail Page Link or Detail Page Button
For behaviour select: Display in existing window with sidebar
For Content Source select URL
Paste the following code snippet into the link text box.