I inherited this computer and want to change font and size

Change the font sizes available in the Fonts window.

1. In an app on your Mac, choose Format > Show Fonts or Format > Font > Show Fonts.
2. In the Fonts window, click the Action pop-up menu , choose Edit Sizes, then do any of the following:
   
   • Add a font size: Type a new size, then click the Add button .
   • Change the values on the slider: Type new values in the Max. and Min. fields.
   • Remove a font size: Select it in the list, then click the Remove button .
   • Restore the original values: Click Reset Sizes.
3. Click Done.

See alsoMake it easier to see what's on the screen of your MacFormat text in documents with fonts on MacCreate or change font collections on Mac

Are you seeking to adjust font size in a browser windows, on the computer desktop, in a type of document, in an image file, or generated by printer? Here is a link covering some of these matters and it even provides steps by each operating system.

How to Change Font Size on Computer

hi Sharon.
it would be nice if you had of said on what.
but try this.
Click View, select Zoom, and then click either Zoom In Ctrl ++ or Zoom Out Ctrl +- to increase or decrease the text size. Note: To reset the font setting back to its default size, hold down the Ctrl key on your keyboard and then tap the number 0.

How do I enlarge or reduce the font size on my web browser? - AOL ...

https://help.aol.com/.../how-do-i-enlarge-or-reduce-the-font-size-on-my-web-browser
How do I make the font size larger on my computer?Fig 3Click on or press 'Alt' + 'Z' to select 'Change the size of text and icons' under 'Making things on the screen larger'.Select or 'TAB' to 'Change Display Settings'.To change your screen resolution, click to select and drag the pointer or press 'Alt + R' then use the arrow keys, Fig 4.More items...Windows 7 and 8 - Making text larger ' My Computer My Way
How do I increase font size on laptop screen?Open Screen Resolution by clicking the Start button , clicking Control Panel, and then, under Appearance and Personalization, clicking Adjust screen resolution.Choose one of the following: Smaller - 100% (default). ...Click Apply. To see the change, close all of your programs and then log off of Windows.How do I increase letter font size on my new laptop? - HP Support Forumhttps://h30434.www3.hp.com/t5/Notebook-Video...increase...font-size.../1286313Search for: How do I increase font size on laptop screen?
How do I change the font size of my email messages?Change the default font, color, style, and size for messagesOn the File tab, choose Options > Mail. ...Under Compose messages, choose Stationery and Fonts.On the Personal Stationery tab, under New mail messages or Replying or forwarding messages, choose Font.More items...Change the default font or text color for email messages - Outlook
or you could read up more at this link.
How do increase font size Google Search

You haven't told us where on the computer you want to increase the font size. If you just talking about the browser screen, in most cases you can just hold down the Ctrl key and press the + key repeatedly until they are the size you wish. In MS Word you change the size in the window slot to the right of the font name.

If you have a Yahoo! account, you can change the appearance of your messages.
For example, you can change font color or size.

If the default font size for Yahoo! is too small or too large, there are two ways to change the font size.

You can change the font size while composing a message or you can change your settings and change the font size for all messages.

Click "New" to compose a message and click "Rich Text" beside the "Subject" line to show font options.

The appearance bar will open in your e-mail message; you can change font color and size here.
Highlight the text you want to change the font size.
Change Font Size in a Yahoo! Mail Message
Look to the font options toolbar above the e-mail message and click the arrow beside "12," the default font size.

A drop-down list will open with the available font sizes.
Select a different font size from the drop-down list.

The font size of the selected text will change.

Change Font Size Permanently in Yahoo! Mail


Sign in to your Yahoo! Mail account and click "Options" located at the top, right corner of the window.


Select "More Options" from the drop-down list. The Options page will open.

You can change your signature or message settings here. Select "General" from the list of options and look to the section marked "Plain text font."


Click the arrow beside "12," the default font size and select a different font size from the drop-down list.


Click "Save Changes" to save the new font size.

Where do you want to change the font size on the overall computer or in a word document?

In a word document you will see a number at the top of the window that represents the font size that you can change. If you have problems within word there is a Help option where you can simply type: Font Size and it will bring up instructions to change.

To change font size on everything in the computer:
Find an open space on the windows desktop and Right Click then select Properties. When the Display Properties window opens click the Appearance Tab then look down towards the bottom left you will see where you can change the font size from Normal to Large or Extra Large. Change the size then Click Apply then click OK.

You can also get the Display Properties by clicking Start/Control Panel and look for Display or Appearance and Personalization. Once the display opens click the Appearance tab to change the font size.

to change font size, CTRL+SHIFT+P and the Option for changing fonts will appear then you can customize font size.

Press and hold the Ctrl button, then press the + and - keys to change the size of the font key. You can also press Ctrl and use the mouse wheel.
Good luck!

To change the font size, point your mouse to the desktop then right click. Click on Properties - Appearance (tab). The third option is FONT SIZE. You can adjust the size from there.


Hope this helps. Thank you!