Posted: Sun Feb 17, 2019 4:03pm
It all depends on the program and what it's installed on. The following are my first thoughts if you're using Windows.
If you hover over a corner of the calendar, do you get a little arrow to let you drag it larger?
With the calendar active on your desktop, try holding down the Ctrl key and pushing the scroll wheel on your mouse forward to enlarge it.
If you double-click on the calendar title bar, does that enlarge it to full screen?
If you right-click on the shortcut you use to open it, select Properties and you'll see an option to open it as maximised or in a normal window.