How to merge many Tif images in one large (huge) image

[MohammadReza]

I have a many of tif image pieces and want to merge them in one large tif. but , i don't know , how can i do it with ExifTool.

[sevy]

I don't think you can do it with ExifTool.
Exiftool will give you a lot of information about metadata but is not dedicated to image manipulation.
To merge tif files, you may try :
XnView or XnViewMP : https://www.xnview.com
IrfanView : https://www.irfanview.com/

[StarGeek]

sevy is correct.  Exiftool cannot manipulate image data, only metadata.

If you need to do this on the command line, then look into ImageMagick's Compose option.