Setting Design Themes and syntax highlighting:
Launch the text editor "EmEditor".
Select "Service => Properties for all configurations"
Go to the "View" tab;
Opposite the line "Subject:" with the drop-down list, click the arrow button >
In the context menu that opens, select "Import..." and point to the theme file " with the extension.eetheme"
To the question "Delete old themes?" agree "Yes", so that the topics already available by default are not repeated.
Select a new topic from the list of topics you like. I recommend "Black color".
Also, to highlight the syntax of special file types, for example C++, 1C, Perl, PHP, HTML5, Action and others of more than a hundred names, you can download and install individual libraries from the offsite: https://www.emeditor.com/library/#toggle-id-6
Installing syntax files:
Download the required syntax file (with the extension *.esy)
Open your program file in EmEditor and go to "Service -> Select Configuration -> Define configurations...(at the very end of the list)"
Select the file type, for example C++, C#, ASP, BAT - to which you want to apply the syntax.
Click the "Properties" button in the same place on the right".
In the header of the settings window that opens, the "Properties: of your file type" will be displayed.
Go to the "Highlight (1)" tab and click the "Import" button...".
Point to your *.esy syntax file
Now the highlighting for a certain type of file will highlight the source code in a certain way.
There you can also download and install many additional Macros (76 pcs), Plugins (86+31 pcs), Snippets (2 pcs) and Templates (4 pcs).