When cryopreserving a sample, you can do the following to locate/add new canes within canisters.
Search for a cane by typing the name of that cane you are looking for in the cane text box.
If the cane does not exist yet, you can click "Add [cane name]" to add the cane to the canister on the overview.
Note: If you do not see the option to add a new cane when typing, this is likely due to insufficient capacity on the canister.
An Embryology Admin can increase the capacity in the tank settings.