I accidentally added my great grandfather's from my grandfather's side to my grandmothers' side by accident and i cant fix it. please help!
To correct wrong relationships, you have to go to a person page. You can not do it from the tree view. It sounds like you added your great grandfather from your grandfather as the father of your grandmother. If this is the case, you can go to the person page of your grandmother and in the details view, scroll down to the family members section. On the right hand side where it shows your grandmother as a child, click on the edit icon (little box with pencil) to the right of your grandmother. You can then remove your grandmother from her incorrect father. In case we have misunderstood exactly what you did, here is a link to an article about correcting parent child relationships. Please let us know if you need more help. Thanks for visiting us on Family Search Community.
@susanamiranda6 , I see you edited your question after Wayland's response, so are you still having trouble?