How to get back to the first address of a wallet.

[Merit.s]

Pls I need assistant
I downloaded an electrum online wallet app,registered and had an electrum wallet.
I signed it with my password and I was given my private keys,which I copied the address of this wallet.
I have been busy reading articles on the forum and I came across an article about signing a message from your electrum wallet.
It say that when I login,I should go to new address on the page with different unused wallet addresses and chose a new address, which I will use to sign a message but couldn't sign a message.
The problem I have is that, how can I go back to the first wallet address which I copied when before choosing the new address I wanted to use in signing a message.
I sent the address since I opened it to a business partner and he will be sending btc into the wallet soon.
I hope my coins will enter my electrum wallet.

[OmegaStarScream]

You said you couldn't sign a message, what's the error showing to you?

If the address is not showing in your addresses list for some reason, and you still have the address copied somewhere, then you can go to Tools > Sign/verify the message, paste the address, write whatever message you want, and click sign.

[Charles-Tim]

I downloaded an electrum online wallet app,registered and had an electrum wallet.

You just need to setup the wallet, not register. Which site did you downloaded the wallet? It is from https://electrum.org?

You can use any address on Electrum wallet, generated by the Electrum to sign a message.

It say that when I login,I should go to new address on the page with different unused wallet addresses and chose a new address, which I will use to sign a message but couldn't sign a message.

Login? No, you just need to open the wallet after you setup the wallet to generate keys and addresses and do the signing as OmegaStarScream commented. Electrum is noncustodial wallet and do not need login like on custodial wallet.

[hosseinimr93]

The problem I have is that, how can I go back to the first wallet address which I copied when before choosing the new address I wanted to use in signing a message.

You can see all your addresses in "Addresses" tab.
If you don't see "Addresses" tab, click on "View" at top of the window and select "Show addresses".

I sent the address since I opened it to a business partner and he will be sending btc into the wallet soon.
I hope my coins will enter my electrum wallet.

If the address belongs to your wallet and you didn't take that from somewhere else, any fund that is sent to that at any time will be shown in your wallet.

[dkbit98]

It say that when I login,I should go to new address on the page with different unused wallet addresses and chose a new address, which I will use to sign a message but couldn't sign a message.

There is no Login option in Electrum wallet.
This is non-custodial wallet and only thing you could enter is password you set up during wallet creation.
Just make sure to download latest version 4.3.2 of Electrum wallet from their official website, and let it sync for a while.

The problem I have is that, how can I go back to the first wallet address which I copied when before choosing the new address I wanted to use in signing a message.
I sent the address since I opened it to a business partner and he will be sending btc into the wallet soon.

You can see all your address if you click on Addresses tab, and all transactions can be seen in History tab.
If you created wallet from scratch with seed words you will have many addresses and change addresses shown.

[Pmalek]

I signed it with my password and I was given my private keys,which I copied the address of this wallet.

This is a very confusing statement. What are you trying to do? You can't sign a message with your password. You need the addresses' private key to create a valid signature.

Why are you trying to sign a message in the first place? You don't need that to receive bitcoin. Who is asking you to provide a signed message? Does it have anything to do with Hey Newbies! Can You Sign A Message? Your business partner can send coins to any of the addresses you copied from the addresses tab in your Electrum client. You just need to check the characters of the copied address to make sure it's the same as the one shown in your Electrum wallet. Did you do that?

[Merit.s]

OK this is an educating community.
I have understood everything you all told me.
No login,its just password,I haven't used electrum walle,
Am use to trust wallet,its good to learn something new.
 
@ Pmalek thanks,I just check the copied address,
I saw it on the unused address

[Pmalek]

Since you have a choice between using Trust Wallet and Electrum as your go-to software wallet, Electrum is the obvious winner in that category. It's been around for many years and hasn't caused headaches for its users except in cases that were directly or indirectly their own fault. I am thinking of the arbitrary server messages that led to users downloading fake Electrum apps that caused the loss of coins. But that's a thing of the past now. 

We don't know much about Trust Wallet. It's a multicurrency wallet and non-custodial. Electrum is Bitcoin-only and also non-custodial. But it has the added advantage of being open-source, which Trust Wallet isn't.

[hosseinimr93]

No login,its just password,I haven't used electrum walle,
Am use to trust wallet,its good to learn something new.

I don't really understand you.
In the OP, you were talking about your electrum wallet and signing message an asked how to see your addresses. Now, you are saying that you haven't used electrum and you are using trustwallet.
As far as I know trustwallet gives you a single address for bitcoin and doesn't support signing/verifying messages at all. 

[khaled0111]

OP, I hope am understanding you correctly: you used to use trustwallet but now you are using Electrum and want to know how to sign a message from a particular address? Is this what you are trying to achieve?
If I understand you correctly, then your confusion is due to the fact that Electrum, unlike trustwallet, generates a new address each time you click the receive button, and you want to sign the message with the first address you generated, right?
If this is the case then follow hosseinimr93 instructions on how to get all your addresses then copy the one you want to sign the message with. Open the sign tab then paste the address there and type your message.

[Pmalek]

I don't really understand you.
In the OP, you were talking about your electrum wallet and signing message an asked how to see your addresses. Now, you are saying that you haven't used electrum and you are using trustwallet.

The language barrier is the problem here, plus OPs lack of knowledge. I think he was trying to say that he used Trust Wallet in the past, and got used to the way that wallet works. But now with Electrum, things are different. I have never used Trust Wallet, but I am pretty sure that they work in completely different ways. It's still unclear why OP needs to sign a message at all as he didn't say. 

@Merit.s
This forum has local language sections where you can post in your mother tongue. Maybe you will be more comfortable explaining the problems you are facing that way. If you tell us what language you speak natively, we can link you to the correct board? If not, you will find the local language forums at the bottom of Bitcointalk's main page.