In the Menu Bar, click Edit > Preferences, then on the left side of the dialog box, select Render Settings. After making any changes, press Apply and OK to save them.
Image
Default Format - Determines the default rendered image format.
Resolution - Sets the resolution width and height in pixels for images rendered to disk. Use the drop-down list to select from standard resolutions.
DPI (Dots Per Inch) - Defines the image resolution in dots per inch.
Size (w x h) - Displays the physical image size in millimeters and calculates it using the resolution and DPI values.
Advanced
Supersampling - Enables the increase of antialiasing quality. This may impact performance.
Stereo Mode - Determines the rendered stereo mode settings. Options include Mono, Stereo, 5 Eye Stereo (five images), and 9 Eye Stereo (nine images).
Compression Quality - Sets the compression quality of an image by percentage. This only applies to image formats that support compression, such as JPG. For no compression, enter -1.
Framebuffer Memory Limit - Sets the rendered framebuffer memory limit to ensure it is not exceeded.
Export Image with Alpha Channel - Renders the alpha channel into the resulting image, if the file type supports it. You can select the alpha channel color separately.
Show Rendered Image after Saving - Opens a separate window, showing the rendered image.
Single Image Viewer Window - Shows only one image per window.
Ignore Aspect Ratio - Squashes or stretches the rendered image and ignores the aspect ratio.
Export TIFF/PSD in HDR Format - Toggles the export of TIFF/PSD in HDR format on or off. Exports the HDR format as TIFF/PSD (32 bits per channel), when enabled.
Export EXR in 16 Bit Float Format - Toggles the export of EXR in HDR format on or off. Exports the HDR format as EXR (16-Bit Float), when enabled.
Export Multi Layer EXR/PSD for Render Passes - Toggles the export of Multi Layer EXR/PSD in HDR format on or off. Exports the HDR format as Multi Layer EXR/PSD, when enabled.
Animation
Use these controls to set the start frame, stop frame, and frame rate for your animation. You can export a series of images or an AVI movie.