OK, where did this go now? There has always been a popup under the lasso tool with both the polygon and the magnetic lasso. I use them both a lot. Are they gone, or am I just experiencing a glitch with this lovely $500 a year creative cloud?
Weird I haven't touched anything since opening it 1/2 hour ago.
Got it figured out now. Well at least this question and answer is out there now for searches, I couldn't find an answer
Glad to help
I have tried this and also reset all tools. The Magnetic Lasso Tool shows up, but still no Polygonal Lasso Tool. Guess I'll try quitting and restarting PS to see if that helps.
I think this is Adobe trying to make our life "Simpler".
I wish they minded their own business.
Also, OP could be on a different workspace. Click the icon at the top right for workspace and choose "Essential." Now, try and right click on the lasso tool and see if it is there. It should be there by default now.
Found this answer the most helpful, thank you my friend.
'It seems that your toolbar has been edited' So by a ghost?! - I certainly haven't touched it - I had the same problem - infact many of the tools had disappeared. I was forced to go to CC as 5.5 didn't work with High Sierra. I am paying a stupid amount for something that has more bugs in than is acceptable.
Also missing polygon lasso tool .. Resetting to "Essential" did not do it. I discovered the top right Search icon. Searched Polygon tool, and presto! It appeared in place .. This shouldn't happen with a fresh install of Photoshop.
OOOPS! All the options for the tools that I used to access by clicking the little triangles in the lower right of each tool gliff, are now revealed with a three finger swipe over the tool .... (Mac - infrequent user .... :-//
for anyone who ended up here from google over a year later, click and hold on the lasso icon to get the alternate modes. -_-