Test Cases - Blue Lines, General Notes, Requirement Linking

Had a few general questions regarding Test Cases/Individual Test Runs.

1.  When executing a Test Case for a new Release, we may encounter a step that needs to be updated to reflect new functionality (that wasn't caught ahead of time).  Is there a way to make that update while executing the run so that it would be documented and update the Test Case going forward?

2.  Is there a way to insert a row within a Test Case that isn't necessarily a step, but more for informational purposes for upcoming steps (i.e "The following steps are time critical") that doesn't require you to technically Pass/Fail/Block it as a "Step":

3.  I created a Custom Test Step property for Requirements where specific steps list the Req # they are associated with.  Is there a way to turn that Req # into a link to the Requirement that is also in Spira?  It seems like the Requirement ID assigned to that Requirement by Spira can be linked somehow, but I cannot get it work properly.

Thank you!