Blender 2.8 Render regions (how to render only part of view)

In this blender (2.8) tutorial we go over how to use render regions. This enables you to render only a part of your view (speeding up cycles and render times)

Step 1:
Hit ctrl+b and select some render region

Step 2:
Enable border in the render output tab (if you only want to render the region)

Step 3 (Optional):
Enable crop in the render output tab (to crop into this regions during render)

[Curiousonic]

Hit Ctrl + B and select-drag over the region you want to render, or hit Ctrl + Alt + B to disable render region.

[JoaoSilva]

THANK YOU FOR SHOWING EASILY IN 1 MINUTE, NOT 15.

[jimEther]

Thank you for this very specific answer to a very specific problem that was causing me much troubles.

[darkdoom]

Straight up what i needed, THANKS!!!!

[AmandaJeansComics]

Damn this is helpful. My 3D environment is getting pretty big lol thanks for another great tutorial!

[jasonnehceis]

PLEASE in addition to showing hot keys also show where to find features in the menu systems as not everyone uses the same hot keys or is adept at using them yet. Thank you!

[julesmartin]

CTRL+B and drag.
To disable: CTRL+ALT+B

[sangeunlee]

Thanks a lot! It really decreased the rendering time for me!

[rtdietrich]

Ty for this nice Video. Where did you get this nice tool showing the keys you just pressed? I need this too

[sergiolon]

THX for the tip. It doesn't work for equirectangular renders, right? I mean, final renders... :)

[zenshirogs]

How can I move the region but maintain the size?

[MDuaTP]

Is it possible to save region you marked for recalling it in future. Or to manage several different regions?

[Kman]

can we set dimension or pixel size in that region? thanks

[XoioDe]

Thanks! Is there any way to keep the existing rendering underneath? I am used to this from 3ds-Max and it is useful to see the rest or compare different settings ...

[elyakubu]

great video but i wonder if is it possible to create custom render region shape?

[phantomcatprojects]

Can we do something similar in EEVE so that can view final rendered view

[MrReactric]

hello, I use Industry Compatible shortkeys, Where is the ctrl+b button in Blender. ctrl+b doesnt work for my blender shortkey (due to Indst.Compt Shortkeys) I checked the region box. but I couldnt find the region render in the render parameters.

[gnamp]

So- say you'd done the render in full before and realised afterwards that you want to change a single element of it- I appreciate you could rerender into a different file having isolated the bit you want to change (ie changed it and rendered only that region)- how then would you combine the two in the sequence editor?

[dilstories]

Can we animate that CTRL+B. say in an animation with a character moving one end of the screen to another the box follows....

[vitalijsfescenko]

After rendering I do composition by alpha over node to draw rendered transparent image on top of other. Unfortunately render region also crops composite image, is there a simple way to disable render region during composition ?