# The render options box : output tab

## The output tab.

Here are options relative to file output format.

Output file

Output file name. Extensions are added automatically if needed. Note that an existing file is erased without prompt.

File format

Format of the output file. Some options are dependant to this format.

Heightfield output

Indicates povray to output a file in a format compatible with heightfield input.

Size

Size of output image. You can easily use presets to define commonly used formats.

Partial render

You can choose to render only a part of the image by specifying a subshape in the image.