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Option 1 : System Preferences : Accessibility : Zoom .. use the shortcut keys to enable ZOOM when needed<br />
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Option 2 : Reduce the screen resolution in System Preferences : Displays to make &nbsp;EVERYTHING bigger including text<br />
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Option 3: Contact the software developers if there is no option to do this in the App itself (which I expect there is not hence your question)<br />
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Option 4 : <a href="https://filedb.experts-exchange.com/incoming/2019/12_w50/1438630/computer-magnifying-glass.jpg" target="_blank" title="Best option (27 KB)"><img alt="Best option" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2019/12_w50/1438630/computer-magnifying-glass.jpg" /></a>
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Option 1 : System Preferences : Accessibility : Zoom .. use the shortcut keys to enable ZOOM when needed

Option 2 : Reduce the screen resolution in System Preferences : Displays to make  EVERYTHING bigger including text

Option 3: Contact the software developers if there is no option to do this in the App itself (which I expect there is not hence your question)

Option 4 : Best optionhttps://filedb.experts-exchange.com/incoming/2019/12_w50/1438630/computer-magnifying-glass.jpg

computer-magnifying-glass.jpg

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How to edit/resize &nbsp;day numbers [enlarge 1,2...30 etc.] in Calendar Creator for Mac?<br />
Version 1.0.2.493<br />
By StoryRock, Inc.<br />
<br />
StoryRock Platform Version 10.0.0.493<br />
<br />
Java version 1.8.0_112<br />
Mac OS X 10.14.6
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How to edit/resize  day numbers [enlarge 1,2...30 etc.] in Calendar Creator for Mac?
Version 1.0.2.493
By StoryRock, Inc.

StoryRock Platform Version 10.0.0.493

Java version 1.8.0_112
Mac OS X 10.14.6

How to edit/resize  day numbers [enlarge 1,2...30 etc.] in Calendar Creator for Mac?

Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.

Operating Systems

Mac OS X is the desktop operating system from Apple Inc., found on Macintosh computers. OS X consists of a Mach/BSD-based kernel, operating system interfaces primarily based on FreeBSD and additional frameworks (written in C, C++ and Objective-C providing user interface and application-level services.