Hello,I I need to increase by text size in applications (eg notepad++ and google ) it is too small to read.
Kindly assist…
Hello and welcome on this forum. For modify the size of text, open the system settings and follow this links: appearance -> Font. Your find the dashboard for increase the size of the fonts on the right.
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For KDE Plasma and KDE applications, you need to set the text size in System Settings.
Appearance → Fonts
For GTK-based applications like Firefox, you need to set the font size in the application itself.
In most applications, you can also zoom in by pressing Ctrl plus the + key from the numerical keypad.
Addendum: Using the mouse scroll wheel while holding down the Ctrl key also works for zooming in and out. 
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