Prior to learning how we can edit themes in WordPress, assure the following:
1) Backup: Try doing your work from duplicates of backup files and ensure that your data is backed up as you work and make alterations.
2) Permissions: While doing your work online, you would require the necessary allowances to alter and store your files.
3) Text Editor: To make the necessary changes to the file, make use of a Text Editor. Refrain from using Word Processors as they may cause unnecessary modifications in the codification of the characters.
Theme Editor and Plug-in Editor
WordPress has in it two incorporated editors that create a provision to modify the files containing the themes from the browser. These are known as the Theme Editor and the Plug-in Editor.
To gain admittance into the Theme Editor
To gain admittance into the Plug-in Editor
File types that can be edited
HTML, PHP and several other file types can be edited in WordPress, provided they are Writable.
For editing files online, utilizing any one of the optional Text Editors to formulate and an FTP program to upload them is advisable.