Quickie: Quick Vignette
This one is pretty short, but also easy though 😀 Lets get to it !
Take ur Render and add a Ellipse Mask (found in Matte –> Ellipse Mask)
Adjust the Width and Height until the entire screen is covered in white, except the edges. Afterwards add an Blur node and set it to Fast Gaussian, put a hook into Relatives and change the values to something like 10%
Finally add an Mix Node and mix those together. Set the value to multiply annnnd ur done 😀
You can adjust the thickness of the vignette by adjusting the width and height values in the Ellipse mask, but i left it as it is. Oh yeah, i also added an RGB curve to express the vignette out and give the image overall more AWESOMENESS 😀 (But thats not needed for the Vignette though)
Have fun messing around !