How to Adjust Dimensions of Finger Grips?

While designing in Blue Shadow 5, you'll see the option to add a finger grip on Tab "2." of the editing features. The width is adjustable with the circular sliders. However the height remains fixed to "26mm".

You may notice after you input a finger grip and try to edit its dimensions under "5. Info of Selections", nothing happens. In Blue Shadow 5, finger grips are locked by default. In order to "unlock them". Left click to select the finger grip and press the "F3" key.  

Now any dimensional edits are free to be made.