[it is not my balance at all]

[Electrum 4.3.4, but of course this applies to earlier versions too.]

If I'm looking at the nice History tab with all transactions - to top line of the rightmost column, named "Balance", is how much BTC I have in my wallet.  Also, down at the bottom in the "status bar" there's my BTC balance too (and conversion to fiat). 

But it's misleading.  Though called "Balance" it is not my balance at all as it is missing amounts in change addresses.

How do I get it to be the true actual balance of my wallet?

If there's no such way now, then

• I strongly suggest there be such a way
• Is there a way to easily add up all the BTC in change addresses (I know I can see them over on the Addresses tab but can't add them up, even by multi-selecting all of them).

Where is the contents of the configuration file specified?  Fields + possible values.  Thanks!

[Unless]

(I'm new to Electrum.)

I'm going to use Electrum (in Tails OS), configured to talk only to the Electrs on my own Raspiblitz, to transfer coin from a bunch of paper wallets to a proper deterministic wallet.

The paper wallets of course are all P2PKH, and I expect to have to type in private keys (tedious but I've done it before).

• Unless there's a way in Electrum to scan a WIF private key?

I can make an Electrum wallet to match my hardware wallet seed+passphrase.

• Unless I can't actually use a seed+passphrase with Electrum, only a seed?
  

Anyway, I'd like to have Bitcoin Core on the Raspiblitz fully sync'd, then turn off my cable modem (isolating my LAN from the network), then, in that configuration prepare and sign a bunch of transactions - one for each paper wallet.  And then either

• Delete the private keys from Electrum (how?), reconnect to the internet, and broadcast all transactions at once, or
• Export the signed transactions to some file (on a USB key), reboot (the private keys are definitely gone now), reconnect to the internet, import the transactions, and broadcast them, or
• ???

What I'd really like to avoid is doing the disconnect/enter private key/sign transaction/reboot/connect/transmit for each paper wallet.

Hopefully you'll tell me the first option above just works: all the signed transactions just stack up with no place to go until the internet is available and then off they go.  If not though, then what?