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Dimensions and metadata are two settings that can be found in the Render Output tab.

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This is labeled with the printer icon in the Properties Editor.

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Dimensions simply refers to the resolution of the final output image.

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For example, most HD images and videos are 1920 pixels by 1080 pixels.

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You can set your resolution by left-clicking the number and manually typing a new one,

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or you can left-click drag to slide the value left or right as you see fit.

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It's important to know that when you change your output resolution,

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the shape of your camera will change to match the aspect ratio of your output resolution.

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This percentage value represents your ability to reduce the resolution very quickly for, say, test renders.

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If you want a 1080 final output but you want your next few renders to be test footage only,

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you can reduce the resolution with a percentage factor to minimize render times and file size.

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The Aspect slider is simply another way to quickly multiply your X or Y resolution values by a scaler.

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Render Region is a checkbox that is very important if you want to only render a small region of your camera.

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However, you'll notice that if you check this box, nothing actually happens or changes,

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except when you go into Camera View, your camera is now outlined in a dotted red line.

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That's because currently your entire camera is selected as the region you want rendered.

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To change this region, simply go to the View menu, go to View Regions and select Render Region.

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This will give you the ability to draw a rectangular area on your screen to specify which part of your frame you want rendered.

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This will become represented by the dotted red line.

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For hotkey users, simply press Ctrl B to begin drawing your render rectangle.

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It's important to note that if you draw a render region with the Render Region checkbox turned off,

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it will automatically check this box for you.

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To clear your render region and simultaneously turn off the Render Region checkbox,

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simply go back into the View menu, go to View Regions and select Clear Render Region.

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For hotkey users, simply press Ctrl Alt B.

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Crop to Render Region is a checkbox that will reduce your image dimensions to match the Render Region dimensions.

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If you don't have this checked, the final output image will not be reduced

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and will still be the same dimensions as it would be if it rendered the whole image.

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However, only the rendered region will be visible, with the rest of the frame being transparent.

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The frame start and end values are the same values you see on your timeline.

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They are synced, so changing the start and end frames of your playback region in one place will affect the other.

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The Step value will affect how many frames you step forward before rendering the next frame.

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By default, the value is 1, which is the minimum value.

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This means that it will render every single frame.

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However, if you decide you only want to render every 2 frames or every 10th frame in the timeline,

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you can specify that here.

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This does not affect viewport playback, however.

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Frame Rate is simply how many frames per second are meant to be played during playback.

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This can affect both viewport playback and rendered animation playback.

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Time Remapping is a setting that will help you very quickly retime your animation to be faster or slower,

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stretching or squashing the existing keyframes based on the ratio you provide.

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Time remapping is not very commonly used, but can be used to quickly retime your animation to be faster or slower at render.

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Stereoscopy, roughly meaning two eyes, is basically the thing that makes 3D glasses necessary at 3D movies.

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It's a big topic, but to create a stereo 3D output, you'll need to enable this checkbox.

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You'll immediately notice options for the left and right eyes,

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which allow you to specify your preferred suffix for the file names, as each eye will need to be a separate image.

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Fun fact, you can also go into Camera View to see how your scene might look in 3D,

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assuming you have some basic RED and cyan 3D glasses.

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Metadata is another output setting that allows you to include additional information and stamp it onto your output file.

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If we open up this category here, we can see there is Date, Time, Render Time, Frame Number, etc.

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You also have the option to include a custom note.

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Now, right now if we render our scene with the F12 hotkey, you'll see Blender render out a simple image of our camera perspective.

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However, there is currently no metadata visible.

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To show the metadata and include it in the output file, simply check the Burn Into Image checkbox.

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Feel free to tweak the settings there, such as font size and transparency, to your liking.

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I hope this video gives you a good idea of how the dimensions and metadata settings affect your render.

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We'll go more into the file output settings in the next video.