Rob

The settings are now saved & loaded from disk. Not all are hooked in yet, but all of the UI settings are working: you can switch the dark theme on/off...

The audio input setting is now working and will use the input device selected. This leaves only unimplemented things not yet hooked up from the settings. The **Rate adjustment** should...

> The two color trace: that's a good idea, but it needs to be implemented differently. As it is now, it merely alternates the colors, this looks nice but it's...

I worked more on the info text labels and have now split out the numbers and units into separate labels to make them stay in place better. This also makes...

When searching for more data about sound card oscillator precision I found a nice [Android app](http://protyposis.net/clockdrift/user-guide/) designed to measure clock drift. It has example data from various (handheld) devices and...

Added a screenshot feature that can save in either PNG (for posting online) or PDF (for printing). 

Tweaked the screenshot code to hide the buttons below the paperstrip when saving. So now the resulting screenshot images contain no UI elements at all. 

Hi, it's been a year since I submitted this request and I just noticed that you posted on the WUS forum that you are "working on a save/snapshot/print feature", which...

Fair enough. It seems like it boils down to you not wanting to upgrade to GTK+ 3? ...which was the purpose this pull request. The additional commits with features like...