Edited ch02_overview.adoc with Atlas code editor

ch02_overview.adoc

@@ -63,7 +63,7 @@ you've received, spent, and ((("Bitcoin", "operational overview", startref="bitc
 [[spending_bitcoin]]
 === Buying from an Online Store
 
-Alice, introduced in the previous chapter, is a new user who has just
+Alice, ((("transactions", "spending bitcoins", id="transaction-spend")))((("bitcoins", "spending", id="bitcoin-spend")))((("spending", "bitcoins", id="spend-bitcoin")))introduced in the previous chapter, is a new user who has just
 acquired her first bitcoins. In <<getting_first_bitcoin>>, Alice met with
 her friend Joe to exchange some cash for bitcoins. Since then, Alice has
 bought additional bitcoins.  Now Alice will make
@@ -140,7 +140,7 @@ millibitcoins and satoshis.
 ====
 
 You can examine Alice's transaction to Bob's Store on the blockchain
-using a block explorer site (<<view_alice_transaction>>).
+using((("transactions", "spending bitcoins", startref="transaction-spend")))((("bitcoins", "spending", startref="bitcoin-spend")))((("spending", "bitcoins", startref="spend-bitcoin"))) a block explorer site (<<view_alice_transaction>>).
 
 [[view_alice_transaction]]
 .View Alice's transaction on https://blockstream.info/tx/674616f1fbc6cc748213648754724eebff0fc04506f2c81efb1349d1ebc8a2ef[Blockstream Explorer]