npub1y6qs4ru4ccj7q3vclqy80ax5x4t2pyuc6q29ckg6wwg595y4taasswqhw9 (npub1y6q…qhw9)
Thank you, I didn't notice I had to left-click on the highlighted text. It works only for text though, I need rectangular regions like in Logseq. But I like SiYuan implementation, it is cleaner.