I have installed the last version of TeXstudio (2.12.8) but I don't have the greek letters icon ($\lambda$) in the left panel and I don't know how I can obtain it.
Moreover, I have seen other different icons in this bar, how can I add buttons in this left panel?
1 Answers
2.12.8
There were some changes in that panel for version 2.12.8. (See for example https://github.com/texstudio-org/texstudio/issues/73.) If you choose the symbols panel (with the star icon, third from the top), you should find a panel that is split in two. In the lower part you can choose between different sets of symbols, such as operators and Greek letters from a drop-down. Judging by the second screenshot in https://github.com/texstudio-org/texstudio/issues/73#issuecomment-375181645, the default appears to be "Operators", click on the word "Operators" to choose a different set.
2.12.6
For older versions this was a bit different:
Right click anywhere on that bar, and you get a menu where you can choose which panels to show. (The same goes for any other toolbar.)
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*symbol is split in two, and in the lower part you can choose between operators, Greek letters, and more. – Torbjørn T. Apr 05 '18 at 19:18