New user to Tomahawk

Just got the Tomahawk and something’s are not clear?
Quick actions:

Toogle MB MF does mb mean it takes in the tape measure ? MF means not taking the tape measure 6.5 “ inches?

Toogle Rel ? Help?

Show center?

Layout guide ? Not sure what this does?

The numbers in b&w on the handle I believe that these are the saved measurements how are they used what benefit do these have other than recall?

Thanks

Hey Chris, you can find additional details on our support website here - https://support.reekon.tools/hc/en-us/categories/4417628280596-T1-Tomahawk-Digital-Tape-Measure-