how to get a maximum screen format

[Old man]

I installed Linux Mint Cinnamon and after that Windows in Virtualbox. But the screen is too small.
How can I expand it?

[mpack]

Please provide a VM log file. With the VM fully shut down, right click it in the GUI. Select "Show Log" and save "VBox.log" (no other file) to a zip file. Attach the zip here.

[Old man]

I GOT THE MESSAGE:The file is too big, maximum allowed size is 128 KiB.

[scottgus1]

save "VBox.log" (no other file) to a zip file

[Old man]

this is the logfile,you asked for

[scottgus1]

Regrettably this is still not the log. It may be part of it, but there's something wrong in how you are interpreting Mpack's instructions above.

Here is an example of what a properly-posted log should look like: viewtopic.php?f=6&t=96365#p467519

Please try again. We can't do anything to help until you get over this hump.

[Old man]

Help no longer necessary. I fixed it with changing the screen-format in Windows 10. Thanks for your help.
Bart