Using LibreOffice or most other word processors and some text editors,
it is possible to copy and paste the `Ω` symbol and other mathematical
symbols into EasyEDA text both here in the editor and in Forum posts.
the integral symbol: `∫`;
the Sigma symbol: `∑`;
and several more: `∂, ∆, ∏, √, ∞, ≈, ≠, ≡, ≤, ≥` and so on
Insert > Special Characters >...