The Composite Bands function allows you to combine raster layers to form a multiband image.
The interface allows you to add multiple rasters and order them. The raster at the top of the list will become band 1 in the output. The next raster will become band 2, and so on.
Use the drop-down list or the Browse button to choose the raster inputs.
Choose which cell size to use in the output raster layer. If all the input cell sizes are the same, all the options will yield the same results.