I just did a little experimenting with having the Synopsis window open and using the Command Line in the main BW window to change verses. Wow. I tried a couple of different combinations of clicking (a) a radio button to designate the "Active Window" and (b) the checkboxes to "link" and "unlink" windows. I discovered two things: (1) I can't figure out what the connection is supposed to be among these actions; and (2) if I keep trying I will lose either my mind or my Christian control over my tongue, or both. The Command Line does seem to affect the verse displayed in the Synopsis window, but it also seems to want to make the same verse in the same book display in all columns of the Synopsis window, which of course defeats the whole purpose of it.
For instance, with the Browse Window (and browse tab in the Analysis Window) displaying Luke 9:28, the beginning of the Transfiguration, I open a Synopsis window, using the aland-nrs_grk.sdf database. The window displays sec. 161 of this synopsis, texts beginning at Matthew 17:1; Mark 9:2; Luke 9:28; and the tangentially related John 12:28. OK. When I click the Luke radio button to make it "active" (and leave all 4 checkboxes checked), then go back to the Command Line in the main window -- the "Active Window" radio button jumps to the Matthew column! Back to the Synopsis window, click the Luke button again, back to the Command Line and this time the Luke button sticks. (However, any time I click back on the Synopsis window, the "Active Window" button switches to Matthew.) With the Luke column selected as active, I type 9:37 in the Command Line to go to Luke 9:37. In the Synopsis window, all four columns show Luke 9:37 (and nothing else).
So yeah, there is a serious problem with syncing or auto-updating the main window Command Line and Browse Window to a Synopsis window. Then there's this, not really related to what you're asking: when the Synopsis window opens to sec. 161, the titles of the columns are, respectively, Mat 3:17; Mar 1:11; Luk 3:22; and Joh 12:28. Those texts come from the baptism narrative (sec. 18 of the synopsis), specifically the voice speaking from heaven, which is reasonably included among the texts in sec. 161. Apparently what displays as a title above each column is the last, not the first, verse shown in that column. Odd behavior, IMHO.
I can't get any sync at all between the main window and a Parallels window, other than that when you first open a Parallels window it goes to the verse currently showing in the Browse Window.
I agree, some synchronization here would be good. However, I say that without knowing how these things communicate with each other within BW's neural system, so to speak. But frankly, I'd rather have no sync at all between the main window and Synopsis window than the inscrutable oddities currently in place. Of course, I may just need someone more adept than I with the Synopsis window to explain it to me.