Entering Characters
It is necessary to select a metakey which is to be used to enter characters. In this document this metakey is represented by the string "APL". In a terminal window under a Linux GUI Dyalog recommends using the Windows key as the metakey to generate APL characters; with PuTTY and the Unicode IME the Ctrl key is used (similarly to the Windows Unicode edition of Dyalog APL). For example, in a terminal window WindowsKey+agenerates an ⍺; when using PuTTY the same APL character is entered by using Ctrl+a.
Note
Under PuTTY, Ctrl+xcv are reserved for the operating system; we shall see later that Ctrl+x is used for another purpose. Rather than Ctrl+xcv you must use Shift+Ctrl+xcv.
Linux Window managers are in generally in a state of flux, so it is best to look at the following article on the Dyalog Forum for the latest information about keyboard configuration: