Forget above post, I saved the files using save link to and that ended up as html files not ui and py. My bad.
So: Hurray! It works!
I am on 2.8.4 and it works using - o option:
"EMBED_TAB_COMMAND= halcmd loadusr -Wn qtvcp_embed qtvcp -d -c qtvcp_embed -x {XID} -o size=1200,900 cam_align"
Attached screenshot shows the resized window.
As you can see, the camera canvas has been resized using the mouse. You can decrease the camera picture using the lower right hand handle. You can also increase the camera picture, but then it is cropped to the size of the set canvas size (1200x900). once you release the mouse handle upon increasing the camera picture above the canvas size, you cannot grab it again to resize it.
Knowing this, I will not touch it once it is set to the correct size.
Chris: Thanks a ton!
Greez
chris