Update wallet-content.html
MODIFY
HiddenWallet.Gui/app/html/wallet-content.html
HiddenWallet.Gui/app/html/wallet-content.html
<div id="send-content">
<label>Address:</label>
- <input id="address-to-send" type="text" class="form-control" placeholder="186n7me3QKajQZJnUsVsezVhVrSwyFCCZ" required />
+ <input id="address-to-send" type="text" class="form-control" placeholder="bc1q32xe73texphk3cgu33cyw7dajky9u76qltcv6m" required />
<br />
<label>Amount (BTC):</label> <br />
<button class="btn btn-sm btn-primary" onclick="setAmountToAll()">MAX</button>&nbsp

Update wallet-content.html