Virtual Keyboard tools can be used as a Lookup utilities to simplify the input of some special symbols.
There are several kinds of virtual keyboard for Simplified Chinese environment. They are shown below:
The PC Virtual Keyboard appears as below:

The Greek virtual keyboard appears as below:

The Russian Virtual Keyboard appears as below:

The ZhuYin Virtual Keyboard appears as below:

The Chinese Punctuation Characters Keyboard appears as below:

The Number Symbol virtual keyboard appears as below

The Mathmatic Symbol virtual keyboard appears as below:

The Special Symbol virtual keyboard appears as below:

The Table Symbol virtual keyboard appears as below: