Opening text editor in Quartus Prime Pro - Opening text editor in Quartus Prime Pro My project consists of only one AHDL text file. How do I open a text editor to be able to type in this TDF? Sorry for this basic question; just starting Quartus, however I did a lot of AHDL in the past. Thanks Replies: Re: Opening text editor in Quartus Prime Pro Hi HansHolland, I’m glad that your question has been resolved. I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you. Best regards, Sheng p/s: If any answer from the community or Intel support are helpful, please feel free to give Kudos. Replies: Re: Opening text editor in Quartus Prime Pro Issue resolved! My file had a double extention <name>.TDF.txt Ater removing .txt, it was recognized by Quartus. Thanks Sheng Replies: Re: Opening text editor in Quartus Prime Pro Hi HansHolland, Make sure that TDF is set as top level entity by right-clicking that file and click ''Set as Top-Level Entity''. Also, make sure filename matched with the name after module. Best regards, Sheng Replies: Re: Opening text editor in Quartus Prime Pro Hi Sheng, Option 3. you mention, results in "Can't find design entity <filename>" error. I cán see my TDF in the Quartus editor. Trying to compile, results in "Top-level design entity <filename> is undefined" error. Replies: Re: Opening text editor in Quartus Prime Pro Hi HansHolland, If I'm not mistaken, you want to open the .tdf file and then edit it with Quartus pro right? Click the "File" at the top bar of Quartus pro, click ''Open'', select .tdf file type and open your own TDF file. Or straight click the ''Open'' located at bar below. Or click the ''Files" near ''Project Navigator'' window, double click it, click ''...'', select your TDF file, click ''Apply'' and click ''OK''. Double click the added file to open text editor. Hope it helps. Best regards, Sheng Replies: Re: Opening text editor in Quartus Prime Pro Shouldn't be too hard and too much to ask. Want to type-in TDF to get a config. bit stream produced. Failed using my own text editor and use "add design file" or something, trying to find example tutorial, etc. etc.