Most of my quilting is unmarked textures and fillers. The first part of this piece had wavy continuos line scrolled in and out squares, triangles and rectangles. It's a fun and fast filler. This time, I noted I had a more open space than I wanted... albeit small.... so when I note such a thing.... that's all I do is note it by placing a straight pin in it and know I can/ will rectify that later. I find if I stop and fix something right now, I often lose my rythym. I can come back later.
The other time I drop a pin in is when I break or run out of a thread. I place a pin where I stopped to minimize the potential to unravel and so if I take a break, I know exactly where to begin again.
Working this piece, I got to a point in the wavy scrolled fillers, I decided I needed a different texture, different feeling and decided upon an irregular 'channel' of small meandering. In this case, a straight stitch outline on both sides of the would-be channel was desirable. A rare occasion... I blue marked (the washable marker) the outside channel allowing a unquilted tufted area to be saved as a separation between one quilted area and another.
Doing so made it easy to efficiently fill the channel. I also changed thread for interest.