No worries—and sorry it has taken so long to respond, life being what it is. I am not sure there’s a lot to really go on, and I haven’t found any reliable way to not reproduce it, so it could be a weird artifact of my setup.
Setup specific details:
- MacBook Air (mid-2013, 13", 8 GB RAM, 256 GB SSD)
[*]Connected to an external Samsung 40" 1080p TV via Thunderbolt->HDMI (… well, “technically” Mini DisplayPort, I suppose, though the Apple website does name it as a Thunderbolt port) which displays at 1920x1080 (default for display)
- with built-in and external displays both separate displays (i.e., not mirrored), and the built-in at 1440x900 (also default for display)
- macOS 10.14 (18A391)
- Scrivener 3.0.3 (3032)
What i’ve noticed is that the “blank” spot isn’t actually blank, but rather very, very dim. I took a screen capture movie of only the outliner toolbar and a couple of lines worth of content, and when I look at it in full-screen I can see that the text and line are present, but almost invisible:
(hopefully this shows it, the “ds” of Keywords is present, just very light)
The effect extends down about one pixel, but otherwise does not affect the content area:
So, if I had to guess, it seems that it is connected to the drawing of the “header” row/toolbar of the outliner view, including any dropshadow that graphic element may possess. That could be an Apple thing, that could be a drawing-code-in-Scrivener thing, or it could be something with how the output through TB->HDMI interprets that particular piece of it.
The “spot” was still present—in the same location—when I moved the window from the large (TV) display to the built-in display. When I resized the window to fit, it disappeared, possibly because with the resize, that box was now off-screen. On the main display (the TV), I didn’t have the window sized to completely take over the screen (I use the Dock on the right, auto-hide/magnify, and have the Scrivener window full size top-bottom and all the way to the left side, but leave the entire right desktop column and half of the next-to-right column, so I can drag&drop from the desktop still, see image:
), so the box is outside the visible area of the three-panel Layout that I use when I move it to the smaller display and opt-click the zoom button. However, when I switch it to the Default Layout and switch to Outline mode, this box is in the same location, even on the smaller screen. So if it’s caused by being displayed on the larger display, it sticks afterward.
BUT, in the three-pane display that I use, if I resize the window (with option-click on the zoom button) on the smaller display, the box disappears, but only on the smaller display. Moving it to the larger display, the box reappears in the same spot it was in before. Also, if it is in single-pane Layout (like Default) on the smaller display, it shows the box there. It only disappears in the three-pane layout (Dual Navigation, for example) when the outliner is in the upper-right; switching to a single-pane view with outliner, the box reappears even on the smaller display.