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# Understand Interface
As a novice, you only need to quickly grasp the meaning of a few important parts
of the page. You will gradually discover other functions in the next
exploration. The interface may not be the same for different versions.
## Text Editor
In the text editing area, you are free to type any text you want, or create a
new tab using the "New" option in the file menu at the top. You can easily move
or close tabs as needed.
You can perform various operations on your text using the options provided in
the Operations Bar, or you can use common shortcuts like Ctrl+C/V/S to copy,
paste, and save or even find operations.
The text you edit in the text box is encoded in UTF8 and has no formatting. This
plain text format ensures that any redacted message is not confusing. Although
we plan to add rich text editing in the future, the details are still under
consideration.
### Large text file support
GpgFrontend provides support for opening larger files without getting stuck.
However, when opening a relatively large file, you will not be able to edit the
tab until the entire file has been read. Even though editing the file is not
possible during this time, you can still view it.
## Information Board
GpgFrontend displays the result of your current tab page operation in the
Information Board, indicating whether the operation was successful or not. The
text in the Information Board also includes additional information to help you
understand the specifics of your encryption, decryption, signature, and other
operations. The output displayed in the dashboard may vary based on your
language settings.
The Information Board was created to allow for the display of more information
in the same space. However, in the future, GpgFrontend plans to introduce a
graphical interface to enhance the user's understanding of this information.
### Font Color
- **Green**: When the operation succeeds and the results of the operation are
verified and no problems are found, the font color will be green.
- **Yellow**: When the operation succeeds and there are some problems with the
result testing of the operation at that time, the font turns yellow, which is
a reminder to the user. At this time, the user needs to check the details of
the operation.
- **Red**: When the operation is unsuccessful or there is a serious conflict
with the result of the operation, the font color will turn red, and the user
will need to carefully check the details of the operation to ensure security.
### Font Size
When you feel that the font of the information board is too small, you can set
the font size in the Application column of the settings. The font size defaults
to 10 and can be set to a range of between 9 and 18.
### Information Board Actions Menu
The dashboard actions menu provides some commonly used actions for information
board content. This enables users to quickly record large pieces of content in
the Information Board for other uses.
#### Copy
This enables users to quickly record large pieces of content in the Information
Board for other uses.
#### Save File
The operation stores the contents of the information board in the file system in
UTF-8 format. Although the output file does not have a suffix name, in fact this
file is in plain text format.
#### Clear
This action immediately empties the information board. The empty operation
includes the contents of the information board and all the statuses. The
emptying operation occurs automatically when you make the next operation
(encryption, etc.).
### Optional Actions Menu
There will also be a column of Optional Actions Menu below the Information
Board. If there are other auxiliary operations that can be done after your
operation is completed (display more detailed information, send encrypted text
through email, etc.), the entry points for these auxiliary operations will be
displayed here.
## Key ToolBox
Here is a list of key pairs stored on your machine that can be used for Gpg
operations. The key lists in the Toolbox have multiple categories that
correspond to different usage scenarios. The toolbox also provides some commonly
used operations, all of which are in the Key List Menu.
### Usage
Most operations related to Gpg need to specify a key pair (such as encryption,
decryption, signature, etc.). You can select the check box in the first column
of the table in the key toolbox to specify one or more keys for your operation.
Classifications that contain only public keys are often used in cryptographic
scenarios.
### Classification
The Toolbox provides a categorical display through tabs. All classifications do
not include all expired or revoked keys. If you want to view expired or revoked
keys, use the Key Manager. The default classification contains all private and
public keys. The operation takes only the key from the currently selected
classification as input.
### Columns
It is important to understand this list. Now let me take you to understand it
step by step.
- Select: Turn the checkbox in this column to let Gpg Frontend know that you
specify the key of this row for your next operation.
- Type: See this column to let you know the type of key and whether the primary
key exists in your key pair.
- `pub` means this is a public key, Can be used for encryption or
verification operations.
- `pub/sec` The key pair contains both public and private keys. It can be
used for almost all operations(Need to combine the usage column to
determine this).
- `pub/sec#` The key pair contains a public key and a private key, but the
primary key is not in the key pair. This shows that you will not be able
to do some special (add subkeys, sign other key pairs, etc.)
- `pub/sec^` A key pair has one or more keys (subkeys or master keys) in
the smart card.
- `pub/sec#^`The above two situations occur at the same time.
- Name: The identity information of the key pair.
- Email Address: The identity information of the key pair.
- Usage: This determines which operations the key pair can use. Composed of four
capital letters, each capital letter represents a usage.
- `C` Certificate. Generally, the key pair that contains the primary key
will have this usage
- `E` Encrypt. The key pair can be used for encryption operations.
- `S` Sign. The key pair can be used for sign operations.
- `A` Authenticate. The key pair can be used to perform operations like SSH
authentication.
- Validity: One of the concepts of Gpg, simply put it represents the degree of
trust in this key.
## Operations Bar
Here, you can perform corresponding operations by clicking the buttons above.
For example, after typing text in a text editor and setting the key you want to
use in the key toolbox, you can click the encryption button to perform the
operation.
Some operations need to specify the key, and some are not used, which will be
explained in other corresponding parts of the document.
### Customize
Some operations you may not use for a long time, at which point you can uncheck
the relevant function group in the view of the top menu. Conversely, for some of
the operations you use frequently, you can also add here.
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