If you want to book multiple items at once then simply select your bikes before doing the create.
First of all, make sure you're in create mode
- choose your bikes
- either by ID
- or by category
- select which bikes you want
- drag the dates you want (for one of your bikes) in the planner
- add your customer name (or select from the Client Ticket panel above)
- It will create a booking with all selected Items
This little diagram shows you the steps:
Please note -
if you choose bikes by ID then they are auto-selected
if you select via category you need to select them one at a time by clicking on them.