Okular is the best PDF reader on Linux with a flow. As a student, I have to read various documents and copy lots of text from the file. However, using a rectangle to select text is neither smart or not efficient. It can't select specific word between consecutive line and I can't be sure what it has copied unless I pasted it. Using cursor in this sector may solve the problem. Thanks for your time.
If you long-press on the Selection button in the toolbar (or use the Tools menu), you have the option to choose the Text Selection Tool, which should do exactly what you want. Still, I agree that this is rather hard to find and it should be the default mode, too. See Bug 155563 for that.
Thanks for the reply. I had no idea this option existed. Hope this is implemented in near future. :)