No probs, glad it was useful! I use C3 with 2 monitors, so I always have "find" and "find all references" popup windows on a 2nd monitor.
3 other small tips to help with big projects:
I often want to find when an object was created. If you search "create object sprite" or even just "object sprite" or "ct sprite", you'll often get the correct result fast.
You can leave comments with "tags" within. Say you have a complex HUD feature that links to many different events and event sheets, I'd write comments such as "TagForSearch: HUD System" near each event. You can then do a search for "tagforsearch: HUD system" to find all related events of a system you created. You can also do a search for "tagforsearch" to list all of your "tags", which can be useful. Bonus points if you use autohotkey to map a key to auto-type "tagforsearch" so it saves time typing this when doing a search.
Finally, emojis! Sometimes you might be working with, say, 3 different arrays, or multiple families. You can't change the icon of these types of objects, but it is very useful to have a visual indicator to what object is what, rather than having to read their name each time. Simply rename the array or whatever object to have an emoji such as a 🔴 or 🔵 or something distinctive, and you'll always instantly know what array you are looking at. You will even see the emoji within expressions as you scroll through your event sheets. Don't put the emoji at the start of the object name, or else you cannot quickly type its name when adding events, actions, or expressions. To be honest, I use this tip less, but I once had to do a massive change in my huge project to replace a spritefont object with a sprite object - by using "find all references" and giving the old spritefont a red 🔴 in its name and the new sprite is given a 🟢 in its name, it reminds me that "red is bad, this needs to be updated", and "green is good, this is correct". Sure I could have just kept using find all references, but seeing the little red dot amongst expressions helped me quickly edit my events to get the job done faster. Also just in case you didn't know, you can quickly get an emoji window to appear in Windows 10 by pressing "WINKEY + ." (Windows key and the period key).
EDIT: I made a suggestion a year ago, for enhancing the bookmark bar. Looking at this again, perhaps "colourful bookmarks" isn't user-friendly to those with colour-blindness, but perhaps bookmarks could have unique icons or tags against them instead. Either way, consider voting if you are a C3 user that has a huge project to navigate! construct3-21h2.ideas.aha.io/ideas/C321H2-I-4