Hot Reload - Epic Wiki
# Hot Reload
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Approved for Versions:4.10
# Contents
# Overview
Hot Reload is a feature that allows the Unreal Editor to detect newly compiled .DLLs automatically.
# General
The projects contains several configurations by default (see Compiling Game Projects), but for Hot Reload you need to use the * Editor configurations.
# Visual Studio
You will first need to Generate_Visual_Studio_Project, then open the solution (from the explorer or using File -> Open Visual Studio.). If you open a single file from the editor, the build configurations will not be available.
Choose one of the * Editor configurations from the list 
.
Right-click your game project and choose Build to compile. If you selected an * Editor configuration the the build output will contain Compiling game modules for hot reload !
The editor will then reload the DLL as soon as the project is compiled !
# Tips
The toolbar doesn't have a "Build" button by default, to add one follow these steps :
- Click the small arrow at the right of the toolbar
- Click customize
- Go to the Commands tab
- Toolbar -> Standard (or the one you are currently using)
- Add a new command -> Build -> Generate the solution
- Click the new button in the preview, and click Move Down until the place is satisfying enough for you.
This steps are detailed in [How to: Customize Menus and Toolbars in Visual Studio]
# XCode
Please edit and fill me in !
# Notes
The "Compile" button in the editor will not use the same build folder as Visual, so be consistent and either always build from Visual/XCode or always from the Unreal Editor. That way you will not be recompiling untouched files.
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