When I label an equation and later have a reference to it, then by clicking the corresponding link the pdf I jump to that equation, with the equation being exactly at the top of the page. Same goes for footnotes.
But when I just insert a label in the text (for example near a theorem for the purpose to have a link to that theorem in my text) and later in the text have a reference to it and then click on the corresponding link in the pdf, I don't jump exactly to the place where the label was (meaning it isn't at the top of the page like equations ans footnotes anymore), just to right page – with the place where the label was being somewhere around the middle.
What can I do so that the link will send me to the place where the label was, with it being at the top of the page (like for equations) ?
P.S. I use LxY 2.
button on the toolbar. This places, well, a label at that point which you can refer to at other places in the document. The label refers to the last "active" counter, so when you place it right at the beginning of the theorem, you know you get the right one.
button on the toolbar (right next to the insert label-button). You will get a list of all the labels in the document, and a choice of what kind of reference you would like. For example, 
Best Answer
Links jump to the last anchor. Normally hyperref inserts such anchors at sensible places, but if you want a specific location you must do it yourself.