Make the graphic's Start button instruction more obvious for users (#149)

* Make the graphic's Start button instruction more obvious for users

* move some text and notes around

* minor edits

Author: johnsmartco

docs-src/zdm-core/modules/migrate/pages/introduction.adoc

@@ -32,6 +32,11 @@ include::partial$supported-releases.adoc[]
 
 include::partial$migration-scenarios.adoc[]
 
+[TIP]
+====
+An important migration prerequisite is that you already have the matching schema on Target. A CQL statement that your client application sends to {zdm-proxy} must be able to succeed on both Origin and Target clusters. This means that any keyspace that your client application uses must exist on both Origin and Target with the same name. Table names must also match. For more, see xref:feasibility-checklists.adoc#_schemakeyspace_compatibility[Schema/keyspace compatibility].
+====
+
 == Migration phases
 
 First, a couple of key terms used throughout the {zdm-product} documentation and software components:
@@ -42,17 +47,12 @@ First, a couple of key terms used throughout the {zdm-product} documentation and
 
 For additional terms, see the xref:glossary.adoc[glossary].
 
-[TIP]
-====
-An important migration prerequisite is that you already have the matching schema on Target. A CQL statement that your client application sends to {zdm-proxy} must be able to succeed on both Origin and Target clusters. This means that any keyspace that your client application uses must exist on both Origin and Target with the same name. Table names must also match. For more, see xref:feasibility-checklists.adoc#_schemakeyspace_compatibility[Schema/keyspace compatibility].
-====
-
 [.swiper]
 ====
 [.slide]
 --
 .Walk through the illustrated migration phases
-To get acquainted with the migration phases from start to finish, click the **Start** button below.
+To get acquainted with the migration phases from start to finish, click the **Start** button below the diagram. Additional navigation options are available as you proceed through the illustrations and discover the key concepts, software components, and sequence of operations.
 
 image:migration-introduction9.png["Introductory page prompts you to click the Start button to begin the graphical presentation."]
 --
@@ -106,12 +106,6 @@ image:migration-phase5ra9.png["Illustrates migration Phase 5, as summarized in t
 --
 ====
 
-
-[TIP]
-====
-For details on each phase, continue reading the comprehensive topics in this guide. Also check out the {zdm-product} Interactive Lab.
-====
-
 == A fun way to learn: {zdm-product} Interactive Lab
 
 include::partial$interactive-lab.adoc[]