Select from Menu - File - Export Mosaic to File
or use this Quick Button:
Saves rendered target picture.

Output mosaic setup screen.

Use these controls to tune your mosaic export:

Units - You may choose Pixels, Inches or Centimeters as a mosaic size units.

DPI (Resolution) - You need to set this value to allow the program to convert pixels units into inches or centimeters.

Mosaic Width and Height - You have to set one of these values, the other will be calculated automatically.
Note:
These sizes are dimensions of the mosaic area of the output image only. That is if you set size of mosaic to 10 x 10 inches and later will add 10-inch border for all sides, your full output size will be 30 x 30 inches.

Add Grid Lines: - You may add grid lines (lines between cells) to the output mosaic.
Grid Line Width: - Input width of grid line in pixels here.
Grid color - This will bring up a Color Dialogue box to select a color of the grid lines.

Add borders: - You may add borders to the output mosaic.
Left border, Right border, Top border, Bottom border - Input the width of borders here. Widths of the borders are setted in the current measurement units.
Border color - This will bring up a Color Dialogue box to select a color for the borders.

At the left side of the screen you see general information about the output image sizes.

Mosaic size - Overall size of output image in all measurement units. File Size shows approximate value counted for uncompressed image format. If you are saving mosaic to Jpeg image you get much smaller file, due to very efficient Jpeg compression.

Single tile size - Size of a single tile in all measurement units.

Enhanced - In this box you see general information about used mosaic correction. To enable, disable or change correction settings please use blend and correction controls at the main Mazaika screen. I.e. you need to close this screen, edit enhanced settings and activate this screen again.

Color enhance options allow you to change the colors of your tiles to improve the final output. Sometimes this is the only way to get good looking mosaic, especially when mosaic was made using limited count of tiles in the library.  You can use Color correction simultaneously with Blending to get excellent results. Try playing with different values.

The Color correction option "shifts" the colors in a tile to match the average colors of the same area in the original image. This is a similar procedure to correcting the "white balance" of an image that you may have seen in other graphics programs. For example, it may make the tile seem more blue, if the underlying area is quite blue. When a high percentage of correction is used, you may lose some details from the tile image (especially in very dark or very bright areas), but generally this method is very effective, and can be quite subtle, even for values of 50% and upwards.

Blend tile color option blends the output mosaic with the sampled version of the original main theme image (this is a reduced resolution version of the original). At low values (between 0 and 25%), this can drastically improve the final output image without it being too obvious that you have cheated. Above 30% the detail in the tiles begins to be lost in favor of the original image. This option can work extremely well between 10% and 20% especially when combined with a Color correction of between 20% to 50%

Export Selected Cells Only - If you have some region of mosaic selected at the main screen, you may save selected area into image file. This check box is visible only when you have active selection at the main screen.

Add Row and Col Numbers - Use this to print small numbers representing cell coordinates. Lower left cell is numbered 1:1.

JPEG/TIFF/PSB File format - Here you may select a preferable image file format for saving.

Save to file - Press this button to select a file name and start saving.  It may take up to a few minutes to save large mosaics. Speed depends on file format, tile count, tile size and additional options you choose.

Stop - Press this button to stop the saving process at any time.

Note:  The output file will be created on your hard drive at the very beginning of save process. This means that if you will stop the process in the middle you will get a half rendered file that you have to delete manually.

Reveal saved file in Finder - use this button to easy find your saved file in Finder.

Close - Use this button to close the Output mosaic setup screen.