Small update. The built time is 1/23 **Bug fixed** + [Build definition of pi into EE?](https://easyeda.com/bbs_view_840.htm) By [example](https://easyeda.com/project_user_example_1.htm) + [WaveForm limited to 1Hz min in AC analysis](https://easyeda.com/bbs_view_839.htm) By [example](https://easyeda.com/project_user_example_1.htm) **Features** + [Add Ngspice Echo](https://easyeda.com/bbs_view_841.htm) By [dillon](https://easyeda.com/project_user_dillon_1.htm) + add Icon for waveform + You can hide Curves in wavefrom +EasyEDA can remember your wavefrom's config, such as background, width, height and so on. maybe you like White background and blank curves all the way.