Assembler Editor Margins and Text Casing Options

You can use the settings in Tools > Options > Text Editor > Assembler and on the Margins page to display the margins and the ruler.
Show margins
Displays the margins in the editor.
Show the ruler
Check this to view the ruler in the editor.
Mainframe style
Check this to display the Mainframe style of the ruler.
Text casing
Force upper case
Check this to force upper case in the Assembler editor. When enabled, any code you insert in the source file is forced to upper case. This applies to code you type, paste or is inserted automatically. To switch this on or off, you can alternatively use the Force uppercase in the editor button in the COBOL toolbar, or click Edit > Advanced > Force Uppercase menu item while the Assembler file is opened in the editor.