Step 1 : First open ms powerpoint and go to "Design" option
Step 2 : Now you see that right cornerb side "Backround styles" option
Step 3 : Click that backround styles option now you see diffrent style off colors and then down side you see "Format Background"
Step 4 : Click that "Format backround" option now you see format backround small box
Step 5 : Then click "Fill" option now you see many option and click "Picture or texture fill"
Step 6 : Now you see option name like " Insert From:" "File" option
Step 7 : Click file option now open your computer Local disk go to your image and select that image now open the image
Step 8 : Now you see down side "Transparency" option if you want to increase or decrease your transparancy level click that option
Step 9 : Thats all now click "apply to all" now succesfully applied all slides your backgroud image
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