Once you have some level edits you can use the Lumberyard Launcher.exe to preview the level in its own Window. This is the process I used to test a simple level. I recorded parts of it in a Twitch Stream.
Go to your Limberyard Directory and Locate the
dev\Bin64vc141. There will be a a launcher with your Project_Name,
Unfortunaly it starts out blank after seeing the Lumberyard Logo. There will be no
Go back to the Editor and Export your level this will make sure the Game Launcher has the latest level Data to run.
Menu > Game > Export to Engine
Relaunch your launcher and open the console by pressing the
Tilde ` (Its the Key next to number 1 on the top row keyboard.
Type in Map followed by your Map Name
To Autoload A Specific Map
In your project folder create a new file called Autoexec.cfg
edit the Autoexec.cfg file in Notepad / Text Editor Type in the name of the Map Name.
Save the Autoexec.cfg file
When you relaunch the editor it will show up by default.
Links to various YouTube videos Tutorials on how I did this in Lumberyard:
Episode 13 Getting Started with Exporting a Level