You may downlaod the whole RevMan 5.3 manual here: https://training.cochrane.org/sites/training.cochrane.org/files/public/uploads/resources/downloadable_resources/English/RevMan_5.3_User_Guide.pdf
Thanks for your quick reply I wonder if you can share your experiences and your files with me or can you can you help me with a meta-analysis that I am writing now thanks