I created a scrum Rapid board and assigned a filter which pulled in the issues for the Sprint. I moved the Sprint marker underneath the last issue and clicked on Start Sprint and the issues are now visible in Work Mode.
However, I did not notice the Plan Mode instruction until afterwards, they seem to suggest that you must prioritise first! I need to reorder the issues but in plan mode now it seems only the sprint name and dates can be changed. However one can reorder in work mode to reprioritise - phew.
I missed adding an issue as it was recently added and I did not refresh my rapid board before clicking start Sprint. Is there a way of way of deleteting the created Sprint so I can do it properly next time?