Hi, Edmund
The video is old LC doesn't have the execute line in it now.
There is a little gremlin in the Origin Min. in the view screen from time to time clicking on it will error for me to sometimes. Seems to work better if you Zoom in then use it.
To Reset or move the Origin MIN use the Orgin x,y,z on the right side Layer / Object Properties -
Drawing Origin, change them there.
I haven't had a problem with the Reset Origin, Icon on the Left.
To Zoom-- Hold down the Shift Key then Left Mouse key and move mouse.
To Move side to side up down, hold down Cntr key then Left Mouse key and move mouse.
To Pan View, Hold down center mouse button move mouse.
To Reset View, Double click in view window.
There is a post processo Setting in the Gcode window Use Default.PST in Active post window, Use it to see if your Gcode comes out correct first.
This allows you to setup your own post if you need to change it.
There is a Example.pst, Plasma Example.pst, Mill Example.pst also you can Edit them with a text editor also a Wordpad Document called PostVars List for LasyCam post processor..... in your Mach3 Folder.
When and if you edit the .pst's, include the .pst in the save as file name. (Examp Test.pst).
Sorry to drag on, It is really working nice for me, Modified the Plasma post for our Waterjet Cutter.
Hope this Helps, Chip