My red table box is missing from sheetcam and has been for some time now. I just noticed this. All I have is a black screen. I wanted to do some nesting and no box. I went to job options and set the table size but still have no red box for the table size.
The red box on the drawing canvas is the “material” dimesions, menu Options / ‘Job options’. It is retained from the previous job definition and saved in .job files. Often times someone will open a .job file from someone else and it changes the material dimensions. Another way it is commonly changed is by use the menu Help / Tutorials.