how to read and post old topics??

I assume you mean you want to save a forum thread to be able to read it offline? There are a couple days to do this from a PC:

(1) You can install a PDF printer and simply print out the pages as PDF documents.

(2) You can save the entire page to a folder on your hard drive. There should be an option somewhere in your browser to "Save Page As..." (typically with the keyboard shortcut of [CTRL]+[S]). In Firefox, for example, it's located under the "File" menu on the toolbar. Just make sure, if the option exists, to save the complete webpage. This will create a copy in the specified directory, saving all attached images in the thread, which you can then open in your web browser any time without being connected to the internet.

If that's not what you mean, and are just looking for a quick way to access the threads, then simply bookmark the page.

@Slugger posted:

 

... are just looking for a quick way to access the threads, then simply bookmark the page.

I can not believe all the years I've been an OGR member, I have never thought about this doing this.  It would be so easy to set up sub folders for various topics I want to refer back to.   

Sometimes things in plain sight can not be seen.

Thank You for suggesting it.

Ron

When you use the "Save As" command, your browser will give you a few different file formats to save the page. Be sure to choose "Web Page, complete" as the saved file format. When saved in this format, the browser will save everything - text and images.