I am using Texmaker 4.4.1 for LaTex. Text editor performs a spell check automatically and underlines the wrong spelled words. How can I add new words to the dictionary with which it makes a comparison
In TeXMaker, choose Options -> Configure TeXMaker -> Editor.
The following windows will appear
In the textbox named "Spelling dictionary" you can find the name of the file containing the dictionary you are using.
Open this file in TeXMaker (or in any text editor) and add the words you like. Note that you must respect the alphanumeric ordering.