Step 1: Open TC++ (normally C:\TC\BIN\TC.EXE). In the startup it will show a dialogue box that it doesn’t support full screen mode as seen in the picture below. Just select ignore option. Then it will open the small screen mode. 

Note: Please Click on the images to enlarge.

Step 2: Go to the top left of the window and click Icon. It will show a menu as shown in the figure. Then select properties from the menu.

Step 3: Now it will show the properties window, in which you select the Font tab. There you can see two font options as Raster and Lucida Console. The default will be Raster. You select Lucida Console and select the size from the size list as 28.

Step 4: After selecting the fonts, now you have to select the layout tab where you can see screen buffer size, window size, and window position options.Now make the following changes:

• Screen Buffer Size: Width: 82 Height: 28
  
• Window Size: Width: 80 Height: 26
  
• Window Position: Left: -4 Top: -4
  

Now you will see a larger window and very crisp font size in which you can work perfectly fine.