How to undelegate
This is a simple thing. However, if one has been away from steemit for a long time then the chances of not rememberring the process is high.
I wanted to undelegate my steempower to day, but I couldnt remember. It was @dante31 and @tonyduke that told me how.
I logged in to steempeak.com using steem keychain, then I remember that peakd.com showed me the people I delegated to. I therefore, check the acount of the delegatee on steempeak.com and clicked on action and thereafter click on undelegate steem power.
Change the value to 0 or whatever amount you want.
This might be helpful.