how to return to the line?

[lm2lm2]

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Software versions:

• App Version: [e.g. 1.1 (2)]

• iOS version: [e.g. 11.0]

• iPhone model: [e.g. iPhone 11]

• Server software or domain name: [e.g. Prosody 0.11.10]

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im using snikett on the same version than the other ticket (where there is a bug), but im asking, how to get key to enter/return to the line key?
thank you vm