APEX Developers Introduction
Tutorials for APEX Developers with screenshots and code examples
Full-width APEX File Editor (Web)
The following code should make the APEX IDE File Editor (version 22.1) go full-width.
$(".apex-col-3").css("display","none");
$(".apex-col-9").css("flex","1").css("width","100%").css("max-width","100%");
$(".monaco-editor,.overflow-guard,.monaco-scrollable-element").css("width","100%").css("max-width","100%");
$(".minimap").css("right","0px").css("left","");