## MBM File

MBM, or multi-bitmap, is a Symbian OS-specific bitmap file format. This file contains multiple bitmaps and it can contain both bitmaps with masks and bitmaps without masks. It optimizes the bitmap handling capability of Symbian OS. The MMP editor (in Sources tab > Resources > Bitmaps) and Symbian Project Navigator view provide support for creating and editing mbm files. In the Symbian Project Navigator you can right-click on a scalable icon makefile (for example, Icons_scalable_dc.mk) and select Add MBM/MIF Entry... to open the Edit MBM/MIF Contents window.

The following information is required to add a bitmap without a mask:

- Color format : Specifies whether the bitmap is a gray scale image or a color scale image.

- Color Depth: Specifies the color depth, if the bitmap is a color scale image.

- Bitmap: This is the name of the bitmap file to add to the MBM file.

To add a bitmap with a mask, you will also need to specify:

- Mask Depth: Specifies the depth of the mask being applied to the bitmap.

- Mask: The name of the bitmap file that is used to mask the original bitmap.

##### Related tasks

- Creating an MBM File

##### Related references

- MBM Editor